Home / 12,228.80-18,343.20-6,387.20

Finding the Fourth Proportional to 12,228.80, 18,343.20 and 6,387.20

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Solution

The fourth proportional to 12,228.80, 18,343.20 and 6,387.20 is: 9,580.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,228.80 : 18,343.20 = 6,387.20 : x
  2. Step 2: Convert to fraction form
    12,228.80/18,343.20 = 6,387.20/x
  3. Step 3: Cross multiply
    12,228.80x = 18,343.20 × 6,387.20
  4. Step 4: Simplify right side
    12,228.80x = 117,161,687.04
  5. Step 5: Solve for x
    x = 117,161,687.04/12,228.80
  6. Step 6: Final answer
    x = 9,580.80

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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.