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Finding the Fourth Proportional to 15,405.70, 23,108.55 and 12,234.55

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Solution

The fourth proportional to 15,405.70, 23,108.55 and 12,234.55 is: 18,351.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.70 : 23,108.55 = 12,234.55 : x
  2. Step 2: Convert to fraction form
    15,405.70/23,108.55 = 12,234.55/x
  3. Step 3: Cross multiply
    15,405.70x = 23,108.55 × 12,234.55
  4. Step 4: Simplify right side
    15,405.70x = 282,722,710.40
  5. Step 5: Solve for x
    x = 282,722,710.40/15,405.70
  6. Step 6: Final answer
    x = 18,351.83

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Similar ratio
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1.5x scale

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.