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Finding the Fourth Proportional to 28,286.80, 42,430.20 and 16,460.80

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Solution

The fourth proportional to 28,286.80, 42,430.20 and 16,460.80 is: 24,691.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,286.80 : 42,430.20 = 16,460.80 : x
  2. Step 2: Convert to fraction form
    28,286.80/42,430.20 = 16,460.80/x
  3. Step 3: Cross multiply
    28,286.80x = 42,430.20 × 16,460.80
  4. Step 4: Simplify right side
    28,286.80x = 698,435,036.16
  5. Step 5: Solve for x
    x = 698,435,036.16/28,286.80
  6. Step 6: Final answer
    x = 24,691.20

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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.