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Finding the Fourth Proportional to 43,806.18, 65,719.02 and 12,639

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Solution

The fourth proportional to 43,806.18, 65,719.02 and 12,639 is: 18,961.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,806.18 : 65,719.02 = 12,639 : x
  2. Step 2: Convert to fraction form
    43,806.18/65,719.02 = 12,639/x
  3. Step 3: Cross multiply
    43,806.18x = 65,719.02 × 12,639
  4. Step 4: Simplify right side
    43,806.18x = 830,622,693.78
  5. Step 5: Solve for x
    x = 830,622,693.78/43,806.18
  6. Step 6: Final answer
    x = 18,961.31

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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.