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Finding the Fourth Proportional to 43,670.68, 65,505.84 and 12,505.84

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Solution

The fourth proportional to 43,670.68, 65,505.84 and 12,505.84 is: 18,758.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,670.68 : 65,505.84 = 12,505.84 : x
  2. Step 2: Convert to fraction form
    43,670.68/65,505.84 = 12,505.84/x
  3. Step 3: Cross multiply
    43,670.68x = 65,505.84 × 12,505.84
  4. Step 4: Simplify right side
    43,670.68x = 819,205,554.11
  5. Step 5: Solve for x
    x = 819,205,554.11/43,670.68
  6. Step 6: Final answer
    x = 18,758.71

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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.