Home / 9,660.50-13,331.55-5,681.78

Finding the Fourth Proportional to 9,660.50, 13,331.55 and 5,681.78

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Solution

The fourth proportional to 9,660.50, 13,331.55 and 5,681.78 is: 7,840.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,660.50 : 13,331.55 = 5,681.78 : x
  2. Step 2: Convert to fraction form
    9,660.50/13,331.55 = 5,681.78/x
  3. Step 3: Cross multiply
    9,660.50x = 13,331.55 × 5,681.78
  4. Step 4: Simplify right side
    9,660.50x = 75,746,934.16
  5. Step 5: Solve for x
    x = 75,746,934.16/9,660.50
  6. Step 6: Final answer
    x = 7,840.89

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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.