Home / 8,965.20-12,370.68-5,428.80

Finding the Fourth Proportional to 8,965.20, 12,370.68 and 5,428.80

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Solution

The fourth proportional to 8,965.20, 12,370.68 and 5,428.80 is: 7,490.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,965.20 : 12,370.68 = 5,428.80 : x
  2. Step 2: Convert to fraction form
    8,965.20/12,370.68 = 5,428.80/x
  3. Step 3: Cross multiply
    8,965.20x = 12,370.68 × 5,428.80
  4. Step 4: Simplify right side
    8,965.20x = 67,157,947.58
  5. Step 5: Solve for x
    x = 67,157,947.58/8,965.20
  6. Step 6: Final answer
    x = 7,490.96

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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.