Home / 12,230.40-18,331.20-9,148.80

Finding the Fourth Proportional to 12,230.40, 18,331.20 and 9,148.80

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Solution

The fourth proportional to 12,230.40, 18,331.20 and 9,148.80 is: 13,712.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,230.40 : 18,331.20 = 9,148.80 : x
  2. Step 2: Convert to fraction form
    12,230.40/18,331.20 = 9,148.80/x
  3. Step 3: Cross multiply
    12,230.40x = 18,331.20 × 9,148.80
  4. Step 4: Simplify right side
    12,230.40x = 167,708,482.56
  5. Step 5: Solve for x
    x = 167,708,482.56/12,230.40
  6. Step 6: Final answer
    x = 13,712.43

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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.