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Finding the Fourth Proportional to 28,662.06, 42,982.02 and 11,129.52

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Solution

The fourth proportional to 28,662.06, 42,982.02 and 11,129.52 is: 16,689.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,662.06 : 42,982.02 = 11,129.52 : x
  2. Step 2: Convert to fraction form
    28,662.06/42,982.02 = 11,129.52/x
  3. Step 3: Cross multiply
    28,662.06x = 42,982.02 × 11,129.52
  4. Step 4: Simplify right side
    28,662.06x = 478,369,251.23
  5. Step 5: Solve for x
    x = 478,369,251.23/28,662.06
  6. Step 6: Final answer
    x = 16,689.98

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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.