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Finding the Fourth Proportional to 12,924.80, 19,387.20 and 10,332.80

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Solution

The fourth proportional to 12,924.80, 19,387.20 and 10,332.80 is: 15,499.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,924.80 : 19,387.20 = 10,332.80 : x
  2. Step 2: Convert to fraction form
    12,924.80/19,387.20 = 10,332.80/x
  3. Step 3: Cross multiply
    12,924.80x = 19,387.20 × 10,332.80
  4. Step 4: Simplify right side
    12,924.80x = 200,324,060.16
  5. Step 5: Solve for x
    x = 200,324,060.16/12,924.80
  6. Step 6: Final answer
    x = 15,499.20

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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.