Home / 8,947.28-12,348.12-5,170.64

Finding the Fourth Proportional to 8,947.28, 12,348.12 and 5,170.64

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Solution

The fourth proportional to 8,947.28, 12,348.12 and 5,170.64 is: 7,135.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,947.28 : 12,348.12 = 5,170.64 : x
  2. Step 2: Convert to fraction form
    8,947.28/12,348.12 = 5,170.64/x
  3. Step 3: Cross multiply
    8,947.28x = 12,348.12 × 5,170.64
  4. Step 4: Simplify right side
    8,947.28x = 63,847,683.20
  5. Step 5: Solve for x
    x = 63,847,683.20/8,947.28
  6. Step 6: Final answer
    x = 7,135.99

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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.