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Finding the Fourth Proportional to 53,127.90, 79,691.72 and 13,681.71

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Solution

The fourth proportional to 53,127.90, 79,691.72 and 13,681.71 is: 20,522.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,127.90 : 79,691.72 = 13,681.71 : x
  2. Step 2: Convert to fraction form
    53,127.90/79,691.72 = 13,681.71/x
  3. Step 3: Cross multiply
    53,127.90x = 79,691.72 × 13,681.71
  4. Step 4: Simplify right side
    53,127.90x = 1,090,318,934.03
  5. Step 5: Solve for x
    x = 1,090,318,934.03/53,127.90
  6. Step 6: Final answer
    x = 20,522.53

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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.