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Finding the Fourth Proportional to 40,406.91, 60,543.53 and 20,658.30

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Solution

The fourth proportional to 40,406.91, 60,543.53 and 20,658.30 is: 30,953.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,406.91 : 60,543.53 = 20,658.30 : x
  2. Step 2: Convert to fraction form
    40,406.91/60,543.53 = 20,658.30/x
  3. Step 3: Cross multiply
    40,406.91x = 60,543.53 × 20,658.30
  4. Step 4: Simplify right side
    40,406.91x = 1,250,726,405.80
  5. Step 5: Solve for x
    x = 1,250,726,405.80/40,406.91
  6. Step 6: Final answer
    x = 30,953.28

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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.