Home / 21,149.46-31,721.76-7,108.92

Finding the Fourth Proportional to 21,149.46, 31,721.76 and 7,108.92

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Solution

The fourth proportional to 21,149.46, 31,721.76 and 7,108.92 is: 10,662.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.46 : 31,721.76 = 7,108.92 : x
  2. Step 2: Convert to fraction form
    21,149.46/31,721.76 = 7,108.92/x
  3. Step 3: Cross multiply
    21,149.46x = 31,721.76 × 7,108.92
  4. Step 4: Simplify right side
    21,149.46x = 225,507,454.10
  5. Step 5: Solve for x
    x = 225,507,454.10/21,149.46
  6. Step 6: Final answer
    x = 10,662.56

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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.