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Finding the Fourth Proportional to 28,599.20, 42,891.96 and 9,879.90

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Solution

The fourth proportional to 28,599.20, 42,891.96 and 9,879.90 is: 14,817.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,599.20 : 42,891.96 = 9,879.90 : x
  2. Step 2: Convert to fraction form
    28,599.20/42,891.96 = 9,879.90/x
  3. Step 3: Cross multiply
    28,599.20x = 42,891.96 × 9,879.90
  4. Step 4: Simplify right side
    28,599.20x = 423,768,275.60
  5. Step 5: Solve for x
    x = 423,768,275.60/28,599.20
  6. Step 6: Final answer
    x = 14,817.49

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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.