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Finding the Fourth Proportional to 40,420.90, 60,593.94 and 20,655.89

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Solution

The fourth proportional to 40,420.90, 60,593.94 and 20,655.89 is: 30,964.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,420.90 : 60,593.94 = 20,655.89 : x
  2. Step 2: Convert to fraction form
    40,420.90/60,593.94 = 20,655.89/x
  3. Step 3: Cross multiply
    40,420.90x = 60,593.94 × 20,655.89
  4. Step 4: Simplify right side
    40,420.90x = 1,251,621,683.56
  5. Step 5: Solve for x
    x = 1,251,621,683.56/40,420.90
  6. Step 6: Final answer
    x = 30,964.71

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1.5x scale

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.