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Finding the Fourth Proportional to 22,762.31, 31,412.88 and 18,979.13

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Solution

The fourth proportional to 22,762.31, 31,412.88 and 18,979.13 is: 26,191.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,762.31 : 31,412.88 = 18,979.13 : x
  2. Step 2: Convert to fraction form
    22,762.31/31,412.88 = 18,979.13/x
  3. Step 3: Cross multiply
    22,762.31x = 31,412.88 × 18,979.13
  4. Step 4: Simplify right side
    22,762.31x = 596,189,211.73
  5. Step 5: Solve for x
    x = 596,189,211.73/22,762.31
  6. Step 6: Final answer
    x = 26,191.95

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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.