Home / 28,385.52-39,171.51-15,810

Finding the Fourth Proportional to 28,385.52, 39,171.51 and 15,810

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Solution

The fourth proportional to 28,385.52, 39,171.51 and 15,810 is: 21,817.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,385.52 : 39,171.51 = 15,810 : x
  2. Step 2: Convert to fraction form
    28,385.52/39,171.51 = 15,810/x
  3. Step 3: Cross multiply
    28,385.52x = 39,171.51 × 15,810
  4. Step 4: Simplify right side
    28,385.52x = 619,301,573.10
  5. Step 5: Solve for x
    x = 619,301,573.10/28,385.52
  6. Step 6: Final answer
    x = 21,817.52

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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.