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Finding the Fourth Proportional to 29,174.40, 40,219.20 and 20,764.80

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Solution

The fourth proportional to 29,174.40, 40,219.20 and 20,764.80 is: 28,625.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,174.40 : 40,219.20 = 20,764.80 : x
  2. Step 2: Convert to fraction form
    29,174.40/40,219.20 = 20,764.80/x
  3. Step 3: Cross multiply
    29,174.40x = 40,219.20 × 20,764.80
  4. Step 4: Simplify right side
    29,174.40x = 835,143,644.16
  5. Step 5: Solve for x
    x = 835,143,644.16/29,174.40
  6. Step 6: Final answer
    x = 28,625.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.