Home / 18,126.90-25,023.92-12,156.39

Finding the Fourth Proportional to 18,126.90, 25,023.92 and 12,156.39

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Solution

The fourth proportional to 18,126.90, 25,023.92 and 12,156.39 is: 16,781.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,126.90 : 25,023.92 = 12,156.39 : x
  2. Step 2: Convert to fraction form
    18,126.90/25,023.92 = 12,156.39/x
  3. Step 3: Cross multiply
    18,126.90x = 25,023.92 × 12,156.39
  4. Step 4: Simplify right side
    18,126.90x = 304,200,470.07
  5. Step 5: Solve for x
    x = 304,200,470.07/18,126.90
  6. Step 6: Final answer
    x = 16,781.72

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1.5x scale

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.