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Finding the Fourth Proportional to 12,461.27, 18,691.09 and 6,621.17

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Solution

The fourth proportional to 12,461.27, 18,691.09 and 6,621.17 is: 9,931.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,461.27 : 18,691.09 = 6,621.17 : x
  2. Step 2: Convert to fraction form
    12,461.27/18,691.09 = 6,621.17/x
  3. Step 3: Cross multiply
    12,461.27x = 18,691.09 × 6,621.17
  4. Step 4: Simplify right side
    12,461.27x = 123,756,884.38
  5. Step 5: Solve for x
    x = 123,756,884.38/12,461.27
  6. Step 6: Final answer
    x = 9,931.32

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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.