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Finding the Fourth Proportional to 28,366.47, 42,555.92 and 8,644.52

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Solution

The fourth proportional to 28,366.47, 42,555.92 and 8,644.52 is: 12,968.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,366.47 : 42,555.92 = 8,644.52 : x
  2. Step 2: Convert to fraction form
    28,366.47/42,555.92 = 8,644.52/x
  3. Step 3: Cross multiply
    28,366.47x = 42,555.92 × 8,644.52
  4. Step 4: Simplify right side
    28,366.47x = 367,875,564.73
  5. Step 5: Solve for x
    x = 367,875,564.73/28,366.47
  6. Step 6: Final answer
    x = 12,968.68

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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.