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Finding the Fourth Proportional to 21,242.73, 31,867.92 and 8,755.93

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Solution

The fourth proportional to 21,242.73, 31,867.92 and 8,755.93 is: 13,135.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,242.73 : 31,867.92 = 8,755.93 : x
  2. Step 2: Convert to fraction form
    21,242.73/31,867.92 = 8,755.93/x
  3. Step 3: Cross multiply
    21,242.73x = 31,867.92 × 8,755.93
  4. Step 4: Simplify right side
    21,242.73x = 279,033,276.77
  5. Step 5: Solve for x
    x = 279,033,276.77/21,242.73
  6. Step 6: Final answer
    x = 13,135.47

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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.