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Finding the Fourth Proportional to 17,718.60, 26,581.10 and 8,931.40

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Solution

The fourth proportional to 17,718.60, 26,581.10 and 8,931.40 is: 13,398.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,718.60 : 26,581.10 = 8,931.40 : x
  2. Step 2: Convert to fraction form
    17,718.60/26,581.10 = 8,931.40/x
  3. Step 3: Cross multiply
    17,718.60x = 26,581.10 × 8,931.40
  4. Step 4: Simplify right side
    17,718.60x = 237,406,436.54
  5. Step 5: Solve for x
    x = 237,406,436.54/17,718.60
  6. Step 6: Final answer
    x = 13,398.71

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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.