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Finding the Fourth Proportional to 28,326.01, 42,489 and 13,489.95

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Solution

The fourth proportional to 28,326.01, 42,489 and 13,489.95 is: 20,234.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,326.01 : 42,489 = 13,489.95 : x
  2. Step 2: Convert to fraction form
    28,326.01/42,489 = 13,489.95/x
  3. Step 3: Cross multiply
    28,326.01x = 42,489 × 13,489.95
  4. Step 4: Simplify right side
    28,326.01x = 573,174,485.55
  5. Step 5: Solve for x
    x = 573,174,485.55/28,326.01
  6. Step 6: Final answer
    x = 20,234.92

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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.