Home / 21,281.52-29,385.72-13,731.60

Finding the Fourth Proportional to 21,281.52, 29,385.72 and 13,731.60

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Solution

The fourth proportional to 21,281.52, 29,385.72 and 13,731.60 is: 18,960.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.52 : 29,385.72 = 13,731.60 : x
  2. Step 2: Convert to fraction form
    21,281.52/29,385.72 = 13,731.60/x
  3. Step 3: Cross multiply
    21,281.52x = 29,385.72 × 13,731.60
  4. Step 4: Simplify right side
    21,281.52x = 403,512,952.75
  5. Step 5: Solve for x
    x = 403,512,952.75/21,281.52
  6. Step 6: Final answer
    x = 18,960.72

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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.