Home / 12,238.80-18,358.20-6,397.20

Finding the Fourth Proportional to 12,238.80, 18,358.20 and 6,397.20

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Solution

The fourth proportional to 12,238.80, 18,358.20 and 6,397.20 is: 9,595.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,238.80 : 18,358.20 = 6,397.20 : x
  2. Step 2: Convert to fraction form
    12,238.80/18,358.20 = 6,397.20/x
  3. Step 3: Cross multiply
    12,238.80x = 18,358.20 × 6,397.20
  4. Step 4: Simplify right side
    12,238.80x = 117,441,077.04
  5. Step 5: Solve for x
    x = 117,441,077.04/12,238.80
  6. Step 6: Final answer
    x = 9,595.80

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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.