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Finding the Fourth Proportional to 18,999.52, 28,435.20 and 13,562.88

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Solution

The fourth proportional to 18,999.52, 28,435.20 and 13,562.88 is: 20,298.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.52 : 28,435.20 = 13,562.88 : x
  2. Step 2: Convert to fraction form
    18,999.52/28,435.20 = 13,562.88/x
  3. Step 3: Cross multiply
    18,999.52x = 28,435.20 × 13,562.88
  4. Step 4: Simplify right side
    18,999.52x = 385,663,205.38
  5. Step 5: Solve for x
    x = 385,663,205.38/18,999.52
  6. Step 6: Final answer
    x = 20,298.58

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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.