Home / 21,540.11-29,716.88-15,888.47

Finding the Fourth Proportional to 21,540.11, 29,716.88 and 15,888.47

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Solution

The fourth proportional to 21,540.11, 29,716.88 and 15,888.47 is: 21,919.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,540.11 : 29,716.88 = 15,888.47 : x
  2. Step 2: Convert to fraction form
    21,540.11/29,716.88 = 15,888.47/x
  3. Step 3: Cross multiply
    21,540.11x = 29,716.88 × 15,888.47
  4. Step 4: Simplify right side
    21,540.11x = 472,155,528.35
  5. Step 5: Solve for x
    x = 472,155,528.35/21,540.11
  6. Step 6: Final answer
    x = 21,919.83

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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.