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Finding the Fourth Proportional to 18,424.80, 25,423.20 and 11,350.80

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Solution

The fourth proportional to 18,424.80, 25,423.20 and 11,350.80 is: 15,662.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,424.80 : 25,423.20 = 11,350.80 : x
  2. Step 2: Convert to fraction form
    18,424.80/25,423.20 = 11,350.80/x
  3. Step 3: Cross multiply
    18,424.80x = 25,423.20 × 11,350.80
  4. Step 4: Simplify right side
    18,424.80x = 288,573,658.56
  5. Step 5: Solve for x
    x = 288,573,658.56/18,424.80
  6. Step 6: Final answer
    x = 15,662.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.