Home / 20,987.20-31,327.24-18,496.14

Finding the Fourth Proportional to 20,987.20, 31,327.24 and 18,496.14

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Solution

The fourth proportional to 20,987.20, 31,327.24 and 18,496.14 is: 27,608.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.20 : 31,327.24 = 18,496.14 : x
  2. Step 2: Convert to fraction form
    20,987.20/31,327.24 = 18,496.14/x
  3. Step 3: Cross multiply
    20,987.20x = 31,327.24 × 18,496.14
  4. Step 4: Simplify right side
    20,987.20x = 579,433,141.41
  5. Step 5: Solve for x
    x = 579,433,141.41/20,987.20
  6. Step 6: Final answer
    x = 27,608.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.