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Finding the Fourth Proportional to 7,208.76, 9,947.90 and 4,064.88

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Solution

The fourth proportional to 7,208.76, 9,947.90 and 4,064.88 is: 5,609.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,208.76 : 9,947.90 = 4,064.88 : x
  2. Step 2: Convert to fraction form
    7,208.76/9,947.90 = 4,064.88/x
  3. Step 3: Cross multiply
    7,208.76x = 9,947.90 × 4,064.88
  4. Step 4: Simplify right side
    7,208.76x = 40,437,019.75
  5. Step 5: Solve for x
    x = 40,437,019.75/7,208.76
  6. Step 6: Final answer
    x = 5,609.43

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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.