Home / 8,100.38-12,129.55-6,937.86

Finding the Fourth Proportional to 8,100.38, 12,129.55 and 6,937.86

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Solution

The fourth proportional to 8,100.38, 12,129.55 and 6,937.86 is: 10,388.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,100.38 : 12,129.55 = 6,937.86 : x
  2. Step 2: Convert to fraction form
    8,100.38/12,129.55 = 6,937.86/x
  3. Step 3: Cross multiply
    8,100.38x = 12,129.55 × 6,937.86
  4. Step 4: Simplify right side
    8,100.38x = 84,153,085.07
  5. Step 5: Solve for x
    x = 84,153,085.07/8,100.38
  6. Step 6: Final answer
    x = 10,388.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.