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Finding the Fourth Proportional to 31,438.80, 43,385.20 and 17,291.84

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Solution

The fourth proportional to 31,438.80, 43,385.20 and 17,291.84 is: 23,862.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,438.80 : 43,385.20 = 17,291.84 : x
  2. Step 2: Convert to fraction form
    31,438.80/43,385.20 = 17,291.84/x
  3. Step 3: Cross multiply
    31,438.80x = 43,385.20 × 17,291.84
  4. Step 4: Simplify right side
    31,438.80x = 750,209,936.77
  5. Step 5: Solve for x
    x = 750,209,936.77/31,438.80
  6. Step 6: Final answer
    x = 23,862.55

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.