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Finding the Fourth Proportional to 18,648.48, 28,011.60 and 10,872.48

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Solution

The fourth proportional to 18,648.48, 28,011.60 and 10,872.48 is: 16,331.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,648.48 : 28,011.60 = 10,872.48 : x
  2. Step 2: Convert to fraction form
    18,648.48/28,011.60 = 10,872.48/x
  3. Step 3: Cross multiply
    18,648.48x = 28,011.60 × 10,872.48
  4. Step 4: Simplify right side
    18,648.48x = 304,555,560.77
  5. Step 5: Solve for x
    x = 304,555,560.77/18,648.48
  6. Step 6: Final answer
    x = 16,331.39

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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.