Home / 9,378.83-12,942.25-5,129.11

Finding the Fourth Proportional to 9,378.83, 12,942.25 and 5,129.11

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Solution

The fourth proportional to 9,378.83, 12,942.25 and 5,129.11 is: 7,077.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,378.83 : 12,942.25 = 5,129.11 : x
  2. Step 2: Convert to fraction form
    9,378.83/12,942.25 = 5,129.11/x
  3. Step 3: Cross multiply
    9,378.83x = 12,942.25 × 5,129.11
  4. Step 4: Simplify right side
    9,378.83x = 66,382,223.90
  5. Step 5: Solve for x
    x = 66,382,223.90/9,378.83
  6. Step 6: Final answer
    x = 7,077.88

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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.