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Finding the Fourth Proportional to 40,655.76, 60,939.15 and 20,935.50

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Solution

The fourth proportional to 40,655.76, 60,939.15 and 20,935.50 is: 31,380.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,655.76 : 60,939.15 = 20,935.50 : x
  2. Step 2: Convert to fraction form
    40,655.76/60,939.15 = 20,935.50/x
  3. Step 3: Cross multiply
    40,655.76x = 60,939.15 × 20,935.50
  4. Step 4: Simplify right side
    40,655.76x = 1,275,791,574.83
  5. Step 5: Solve for x
    x = 1,275,791,574.83/40,655.76
  6. Step 6: Final answer
    x = 31,380.34

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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.