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Finding the Fourth Proportional to 8,910.75, 12,282.67 and 7,019.34

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Solution

The fourth proportional to 8,910.75, 12,282.67 and 7,019.34 is: 9,675.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,910.75 : 12,282.67 = 7,019.34 : x
  2. Step 2: Convert to fraction form
    8,910.75/12,282.67 = 7,019.34/x
  3. Step 3: Cross multiply
    8,910.75x = 12,282.67 × 7,019.34
  4. Step 4: Simplify right side
    8,910.75x = 86,216,236.84
  5. Step 5: Solve for x
    x = 86,216,236.84/8,910.75
  6. Step 6: Final answer
    x = 9,675.53

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Find fourth proportional to 4,455.38, 6,141.34 and 3,509.67
Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.