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Finding the Fourth Proportional to 40,396.74, 60,607.48 and 20,689.14

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Solution

The fourth proportional to 40,396.74, 60,607.48 and 20,689.14 is: 31,040.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,396.74 : 60,607.48 = 20,689.14 : x
  2. Step 2: Convert to fraction form
    40,396.74/60,607.48 = 20,689.14/x
  3. Step 3: Cross multiply
    40,396.74x = 60,607.48 × 20,689.14
  4. Step 4: Simplify right side
    40,396.74x = 1,253,916,638.77
  5. Step 5: Solve for x
    x = 1,253,916,638.77/40,396.74
  6. Step 6: Final answer
    x = 31,040.05

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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.