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Finding the Fourth Proportional to 20,612.80, 30,957.12 and 10,758.72

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Solution

The fourth proportional to 20,612.80, 30,957.12 and 10,758.72 is: 16,157.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.80 : 30,957.12 = 10,758.72 : x
  2. Step 2: Convert to fraction form
    20,612.80/30,957.12 = 10,758.72/x
  3. Step 3: Cross multiply
    20,612.80x = 30,957.12 × 10,758.72
  4. Step 4: Simplify right side
    20,612.80x = 333,058,986.09
  5. Step 5: Solve for x
    x = 333,058,986.09/20,612.80
  6. Step 6: Final answer
    x = 16,157.87

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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.