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Finding the Fourth Proportional to 18,987.68, 28,481.52 and 16,057.28

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Solution

The fourth proportional to 18,987.68, 28,481.52 and 16,057.28 is: 24,085.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.68 : 28,481.52 = 16,057.28 : x
  2. Step 2: Convert to fraction form
    18,987.68/28,481.52 = 16,057.28/x
  3. Step 3: Cross multiply
    18,987.68x = 28,481.52 × 16,057.28
  4. Step 4: Simplify right side
    18,987.68x = 457,335,741.47
  5. Step 5: Solve for x
    x = 457,335,741.47/18,987.68
  6. Step 6: Final answer
    x = 24,085.92

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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.