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Finding the Fourth Proportional to 28,599.52, 42,897.40 and 9,879.83

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Solution

The fourth proportional to 28,599.52, 42,897.40 and 9,879.83 is: 14,819.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,599.52 : 42,897.40 = 9,879.83 : x
  2. Step 2: Convert to fraction form
    28,599.52/42,897.40 = 9,879.83/x
  3. Step 3: Cross multiply
    28,599.52x = 42,897.40 × 9,879.83
  4. Step 4: Simplify right side
    28,599.52x = 423,819,019.44
  5. Step 5: Solve for x
    x = 423,819,019.44/28,599.52
  6. Step 6: Final answer
    x = 14,819.10

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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.