Home / 21,441.20-29,568.12-13,987.76

Finding the Fourth Proportional to 21,441.20, 29,568.12 and 13,987.76

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Solution

The fourth proportional to 21,441.20, 29,568.12 and 13,987.76 is: 19,289.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,441.20 : 29,568.12 = 13,987.76 : x
  2. Step 2: Convert to fraction form
    21,441.20/29,568.12 = 13,987.76/x
  3. Step 3: Cross multiply
    21,441.20x = 29,568.12 × 13,987.76
  4. Step 4: Simplify right side
    21,441.20x = 413,591,766.21
  5. Step 5: Solve for x
    x = 413,591,766.21/21,441.20
  6. Step 6: Final answer
    x = 19,289.58

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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.