Home / 28,426.70-39,229.17-15,679.90

Finding the Fourth Proportional to 28,426.70, 39,229.17 and 15,679.90

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Solution

The fourth proportional to 28,426.70, 39,229.17 and 15,679.90 is: 21,638.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,426.70 : 39,229.17 = 15,679.90 : x
  2. Step 2: Convert to fraction form
    28,426.70/39,229.17 = 15,679.90/x
  3. Step 3: Cross multiply
    28,426.70x = 39,229.17 × 15,679.90
  4. Step 4: Simplify right side
    28,426.70x = 615,109,462.68
  5. Step 5: Solve for x
    x = 615,109,462.68/28,426.70
  6. Step 6: Final answer
    x = 21,638.44

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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.