Home / 21,311.98-31,921.36-17,572.21

Finding the Fourth Proportional to 21,311.98, 31,921.36 and 17,572.21

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Solution

The fourth proportional to 21,311.98, 31,921.36 and 17,572.21 is: 26,319.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.98 : 31,921.36 = 17,572.21 : x
  2. Step 2: Convert to fraction form
    21,311.98/31,921.36 = 17,572.21/x
  3. Step 3: Cross multiply
    21,311.98x = 31,921.36 × 17,572.21
  4. Step 4: Simplify right side
    21,311.98x = 560,928,717.67
  5. Step 5: Solve for x
    x = 560,928,717.67/21,311.98
  6. Step 6: Final answer
    x = 26,319.88

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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.