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Finding the Fourth Proportional to 40,689.53, 61,043 and 12,608.96

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Solution

The fourth proportional to 40,689.53, 61,043 and 12,608.96 is: 18,916.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,689.53 : 61,043 = 12,608.96 : x
  2. Step 2: Convert to fraction form
    40,689.53/61,043 = 12,608.96/x
  3. Step 3: Cross multiply
    40,689.53x = 61,043 × 12,608.96
  4. Step 4: Simplify right side
    40,689.53x = 769,688,745.28
  5. Step 5: Solve for x
    x = 769,688,745.28/40,689.53
  6. Step 6: Final answer
    x = 18,916.14

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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.