Home / 31,720.82-47,549.55-21,199.70

Finding the Fourth Proportional to 31,720.82, 47,549.55 and 21,199.70

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Solution

The fourth proportional to 31,720.82, 47,549.55 and 21,199.70 is: 31,778.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,720.82 : 47,549.55 = 21,199.70 : x
  2. Step 2: Convert to fraction form
    31,720.82/47,549.55 = 21,199.70/x
  3. Step 3: Cross multiply
    31,720.82x = 47,549.55 × 21,199.70
  4. Step 4: Simplify right side
    31,720.82x = 1,008,036,195.14
  5. Step 5: Solve for x
    x = 1,008,036,195.14/31,720.82
  6. Step 6: Final answer
    x = 31,778.38

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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.