Home / 9,339.53-12,887.79-5,147.78

Finding the Fourth Proportional to 9,339.53, 12,887.79 and 5,147.78

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Solution

The fourth proportional to 9,339.53, 12,887.79 and 5,147.78 is: 7,103.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,339.53 : 12,887.79 = 5,147.78 : x
  2. Step 2: Convert to fraction form
    9,339.53/12,887.79 = 5,147.78/x
  3. Step 3: Cross multiply
    9,339.53x = 12,887.79 × 5,147.78
  4. Step 4: Simplify right side
    9,339.53x = 66,343,507.61
  5. Step 5: Solve for x
    x = 66,343,507.61/9,339.53
  6. Step 6: Final answer
    x = 7,103.52

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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.