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Finding the Fourth Proportional to 31,491.71, 43,444.50 and 21,279.44

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Solution

The fourth proportional to 31,491.71, 43,444.50 and 21,279.44 is: 29,356.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,491.71 : 43,444.50 = 21,279.44 : x
  2. Step 2: Convert to fraction form
    31,491.71/43,444.50 = 21,279.44/x
  3. Step 3: Cross multiply
    31,491.71x = 43,444.50 × 21,279.44
  4. Step 4: Simplify right side
    31,491.71x = 924,474,413.86
  5. Step 5: Solve for x
    x = 924,474,413.86/31,491.71
  6. Step 6: Final answer
    x = 29,356.12

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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.