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Finding the Fourth Proportional to 19,791, 27,312.54 and 10,959

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Solution

The fourth proportional to 19,791, 27,312.54 and 10,959 is: 15,123.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,791 : 27,312.54 = 10,959 : x
  2. Step 2: Convert to fraction form
    19,791/27,312.54 = 10,959/x
  3. Step 3: Cross multiply
    19,791x = 27,312.54 × 10,959
  4. Step 4: Simplify right side
    19,791x = 299,318,125.86
  5. Step 5: Solve for x
    x = 299,318,125.86/19,791
  6. Step 6: Final answer
    x = 15,123.95

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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.