Home / 29,311.80-40,462.38-20,939.64

Finding the Fourth Proportional to 29,311.80, 40,462.38 and 20,939.64

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Solution

The fourth proportional to 29,311.80, 40,462.38 and 20,939.64 is: 28,905.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,311.80 : 40,462.38 = 20,939.64 : x
  2. Step 2: Convert to fraction form
    29,311.80/40,462.38 = 20,939.64/x
  3. Step 3: Cross multiply
    29,311.80x = 40,462.38 × 20,939.64
  4. Step 4: Simplify right side
    29,311.80x = 847,267,670.74
  5. Step 5: Solve for x
    x = 847,267,670.74/29,311.80
  6. Step 6: Final answer
    x = 28,905.34

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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.