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Finding the Fourth Proportional to 28,600.29, 42,895.17 and 11,955.90

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Solution

The fourth proportional to 28,600.29, 42,895.17 and 11,955.90 is: 17,931.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,600.29 : 42,895.17 = 11,955.90 : x
  2. Step 2: Convert to fraction form
    28,600.29/42,895.17 = 11,955.90/x
  3. Step 3: Cross multiply
    28,600.29x = 42,895.17 × 11,955.90
  4. Step 4: Simplify right side
    28,600.29x = 512,850,523.86
  5. Step 5: Solve for x
    x = 512,850,523.86/28,600.29
  6. Step 6: Final answer
    x = 17,931.65

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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.