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Finding the Fourth Proportional to 9,988.56, 15,000.76 and 6,916.56

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Solution

The fourth proportional to 9,988.56, 15,000.76 and 6,916.56 is: 10,387.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,988.56 : 15,000.76 = 6,916.56 : x
  2. Step 2: Convert to fraction form
    9,988.56/15,000.76 = 6,916.56/x
  3. Step 3: Cross multiply
    9,988.56x = 15,000.76 × 6,916.56
  4. Step 4: Simplify right side
    9,988.56x = 103,753,656.59
  5. Step 5: Solve for x
    x = 103,753,656.59/9,988.56
  6. Step 6: Final answer
    x = 10,387.25

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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.