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Finding the Fourth Proportional to 9,987.13, 14,979.53 and 8,331.79

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Solution

The fourth proportional to 9,987.13, 14,979.53 and 8,331.79 is: 12,496.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,987.13 : 14,979.53 = 8,331.79 : x
  2. Step 2: Convert to fraction form
    9,987.13/14,979.53 = 8,331.79/x
  3. Step 3: Cross multiply
    9,987.13x = 14,979.53 × 8,331.79
  4. Step 4: Simplify right side
    9,987.13x = 124,806,214.87
  5. Step 5: Solve for x
    x = 124,806,214.87/9,987.13
  6. Step 6: Final answer
    x = 12,496.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.