Home / 9,331.53-12,876.90-5,139.78

Finding the Fourth Proportional to 9,331.53, 12,876.90 and 5,139.78

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Solution

The fourth proportional to 9,331.53, 12,876.90 and 5,139.78 is: 7,092.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,331.53 : 12,876.90 = 5,139.78 : x
  2. Step 2: Convert to fraction form
    9,331.53/12,876.90 = 5,139.78/x
  3. Step 3: Cross multiply
    9,331.53x = 12,876.90 × 5,139.78
  4. Step 4: Simplify right side
    9,331.53x = 66,184,433.08
  5. Step 5: Solve for x
    x = 66,184,433.08/9,331.53
  6. Step 6: Final answer
    x = 7,092.56

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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.