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Finding the Fourth Proportional to 28,980.70, 39,990.03 and 16,232.11

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Solution

The fourth proportional to 28,980.70, 39,990.03 and 16,232.11 is: 22,398.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,980.70 : 39,990.03 = 16,232.11 : x
  2. Step 2: Convert to fraction form
    28,980.70/39,990.03 = 16,232.11/x
  3. Step 3: Cross multiply
    28,980.70x = 39,990.03 × 16,232.11
  4. Step 4: Simplify right side
    28,980.70x = 649,122,565.86
  5. Step 5: Solve for x
    x = 649,122,565.86/28,980.70
  6. Step 6: Final answer
    x = 22,398.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.