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Finding the Fourth Proportional to 22,517.80, 31,109.22 and 21,437.80

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Solution

The fourth proportional to 22,517.80, 31,109.22 and 21,437.80 is: 29,617.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,517.80 : 31,109.22 = 21,437.80 : x
  2. Step 2: Convert to fraction form
    22,517.80/31,109.22 = 21,437.80/x
  3. Step 3: Cross multiply
    22,517.80x = 31,109.22 × 21,437.80
  4. Step 4: Simplify right side
    22,517.80x = 666,913,236.52
  5. Step 5: Solve for x
    x = 666,913,236.52/22,517.80
  6. Step 6: Final answer
    x = 29,617.16

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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.