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Finding the Fourth Proportional to 15,693.66, 21,691.68 and 13,790.94

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Solution

The fourth proportional to 15,693.66, 21,691.68 and 13,790.94 is: 19,061.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,693.66 : 21,691.68 = 13,790.94 : x
  2. Step 2: Convert to fraction form
    15,693.66/21,691.68 = 13,790.94/x
  3. Step 3: Cross multiply
    15,693.66x = 21,691.68 × 13,790.94
  4. Step 4: Simplify right side
    15,693.66x = 299,148,657.38
  5. Step 5: Solve for x
    x = 299,148,657.38/15,693.66
  6. Step 6: Final answer
    x = 19,061.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.