Home / 15,591.36-21,515.96-8,517.78

Finding the Fourth Proportional to 15,591.36, 21,515.96 and 8,517.78

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Solution

The fourth proportional to 15,591.36, 21,515.96 and 8,517.78 is: 11,754.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,591.36 : 21,515.96 = 8,517.78 : x
  2. Step 2: Convert to fraction form
    15,591.36/21,515.96 = 8,517.78/x
  3. Step 3: Cross multiply
    15,591.36x = 21,515.96 × 8,517.78
  4. Step 4: Simplify right side
    15,591.36x = 183,268,213.77
  5. Step 5: Solve for x
    x = 183,268,213.77/15,591.36
  6. Step 6: Final answer
    x = 11,754.47

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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.