Home / 10,902.15-15,042.66-6,422.85

Finding the Fourth Proportional to 10,902.15, 15,042.66 and 6,422.85

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Solution

The fourth proportional to 10,902.15, 15,042.66 and 6,422.85 is: 8,862.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,902.15 : 15,042.66 = 6,422.85 : x
  2. Step 2: Convert to fraction form
    10,902.15/15,042.66 = 6,422.85/x
  3. Step 3: Cross multiply
    10,902.15x = 15,042.66 × 6,422.85
  4. Step 4: Simplify right side
    10,902.15x = 96,616,748.78
  5. Step 5: Solve for x
    x = 96,616,748.78/10,902.15
  6. Step 6: Final answer
    x = 8,862.17

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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.