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Finding the Fourth Proportional to 43,670.70, 65,512.80 and 12,505.95

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Solution

The fourth proportional to 43,670.70, 65,512.80 and 12,505.95 is: 18,760.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,670.70 : 65,512.80 = 12,505.95 : x
  2. Step 2: Convert to fraction form
    43,670.70/65,512.80 = 12,505.95/x
  3. Step 3: Cross multiply
    43,670.70x = 65,512.80 × 12,505.95
  4. Step 4: Simplify right side
    43,670.70x = 819,299,801.16
  5. Step 5: Solve for x
    x = 819,299,801.16/43,670.70
  6. Step 6: Final answer
    x = 18,760.86

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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.