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Finding the Fourth Proportional to 28,989.01, 43,472.49 and 12,356.83

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Solution

The fourth proportional to 28,989.01, 43,472.49 and 12,356.83 is: 18,530.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,989.01 : 43,472.49 = 12,356.83 : x
  2. Step 2: Convert to fraction form
    28,989.01/43,472.49 = 12,356.83/x
  3. Step 3: Cross multiply
    28,989.01x = 43,472.49 × 12,356.83
  4. Step 4: Simplify right side
    28,989.01x = 537,182,168.61
  5. Step 5: Solve for x
    x = 537,182,168.61/28,989.01
  6. Step 6: Final answer
    x = 18,530.55

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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.