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Finding the Fourth Proportional to 8,868.72, 12,232.68 and 7,190.19

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Solution

The fourth proportional to 8,868.72, 12,232.68 and 7,190.19 is: 9,917.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,868.72 : 12,232.68 = 7,190.19 : x
  2. Step 2: Convert to fraction form
    8,868.72/12,232.68 = 7,190.19/x
  3. Step 3: Cross multiply
    8,868.72x = 12,232.68 × 7,190.19
  4. Step 4: Simplify right side
    8,868.72x = 87,955,293.41
  5. Step 5: Solve for x
    x = 87,955,293.41/8,868.72
  6. Step 6: Final answer
    x = 9,917.47

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Half scale
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Double scale
Find fourth proportional to 8,869.72, 12,234.06 and 7,191.19
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.