Home / 9,371.53-12,931.95-5,179.78

Finding the Fourth Proportional to 9,371.53, 12,931.95 and 5,179.78

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Solution

The fourth proportional to 9,371.53, 12,931.95 and 5,179.78 is: 7,147.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,371.53 : 12,931.95 = 5,179.78 : x
  2. Step 2: Convert to fraction form
    9,371.53/12,931.95 = 5,179.78/x
  3. Step 3: Cross multiply
    9,371.53x = 12,931.95 × 5,179.78
  4. Step 4: Simplify right side
    9,371.53x = 66,984,655.97
  5. Step 5: Solve for x
    x = 66,984,655.97/9,371.53
  6. Step 6: Final answer
    x = 7,147.68

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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.