Home / 12,451.20-18,660.40-9,148.80

Finding the Fourth Proportional to 12,451.20, 18,660.40 and 9,148.80

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Solution

The fourth proportional to 12,451.20, 18,660.40 and 9,148.80 is: 13,711.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,451.20 : 18,660.40 = 9,148.80 : x
  2. Step 2: Convert to fraction form
    12,451.20/18,660.40 = 9,148.80/x
  3. Step 3: Cross multiply
    12,451.20x = 18,660.40 × 9,148.80
  4. Step 4: Simplify right side
    12,451.20x = 170,720,267.52
  5. Step 5: Solve for x
    x = 170,720,267.52/12,451.20
  6. Step 6: Final answer
    x = 13,711.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.