Home / 25,354.80-34,989.12-15,789.87

Finding the Fourth Proportional to 25,354.80, 34,989.12 and 15,789.87

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Solution

The fourth proportional to 25,354.80, 34,989.12 and 15,789.87 is: 21,789.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,354.80 : 34,989.12 = 15,789.87 : x
  2. Step 2: Convert to fraction form
    25,354.80/34,989.12 = 15,789.87/x
  3. Step 3: Cross multiply
    25,354.80x = 34,989.12 × 15,789.87
  4. Step 4: Simplify right side
    25,354.80x = 552,473,656.21
  5. Step 5: Solve for x
    x = 552,473,656.21/25,354.80
  6. Step 6: Final answer
    x = 21,789.71

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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.