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Finding the Fourth Proportional to 28,187.60, 38,890.13 and 16,249.41

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Solution

The fourth proportional to 28,187.60, 38,890.13 and 16,249.41 is: 22,419.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,187.60 : 38,890.13 = 16,249.41 : x
  2. Step 2: Convert to fraction form
    28,187.60/38,890.13 = 16,249.41/x
  3. Step 3: Cross multiply
    28,187.60x = 38,890.13 × 16,249.41
  4. Step 4: Simplify right side
    28,187.60x = 631,941,586.08
  5. Step 5: Solve for x
    x = 631,941,586.08/28,187.60
  6. Step 6: Final answer
    x = 22,419.14

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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.