Home / 39,680.11-54,760.13-21,775.76

Finding the Fourth Proportional to 39,680.11, 54,760.13 and 21,775.76

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Solution

The fourth proportional to 39,680.11, 54,760.13 and 21,775.76 is: 30,051.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,680.11 : 54,760.13 = 21,775.76 : x
  2. Step 2: Convert to fraction form
    39,680.11/54,760.13 = 21,775.76/x
  3. Step 3: Cross multiply
    39,680.11x = 54,760.13 × 21,775.76
  4. Step 4: Simplify right side
    39,680.11x = 1,192,443,475.27
  5. Step 5: Solve for x
    x = 1,192,443,475.27/39,680.11
  6. Step 6: Final answer
    x = 30,051.41

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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.