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Finding the Fourth Proportional to 15,886.46, 23,816.46 and 12,391.95

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Solution

The fourth proportional to 15,886.46, 23,816.46 and 12,391.95 is: 18,577.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,886.46 : 23,816.46 = 12,391.95 : x
  2. Step 2: Convert to fraction form
    15,886.46/23,816.46 = 12,391.95/x
  3. Step 3: Cross multiply
    15,886.46x = 23,816.46 × 12,391.95
  4. Step 4: Simplify right side
    15,886.46x = 295,132,381.50
  5. Step 5: Solve for x
    x = 295,132,381.50/15,886.46
  6. Step 6: Final answer
    x = 18,577.61

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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.