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Finding the Fourth Proportional to 12,357.20, 18,532.20 and 4,458.80

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Solution

The fourth proportional to 12,357.20, 18,532.20 and 4,458.80 is: 6,686.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,357.20 : 18,532.20 = 4,458.80 : x
  2. Step 2: Convert to fraction form
    12,357.20/18,532.20 = 4,458.80/x
  3. Step 3: Cross multiply
    12,357.20x = 18,532.20 × 4,458.80
  4. Step 4: Simplify right side
    12,357.20x = 82,631,373.36
  5. Step 5: Solve for x
    x = 82,631,373.36/12,357.20
  6. Step 6: Final answer
    x = 6,686.90

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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.