Home / 15,331.44-21,157.26-8,617.20

Finding the Fourth Proportional to 15,331.44, 21,157.26 and 8,617.20

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Solution

The fourth proportional to 15,331.44, 21,157.26 and 8,617.20 is: 11,891.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,331.44 : 21,157.26 = 8,617.20 : x
  2. Step 2: Convert to fraction form
    15,331.44/21,157.26 = 8,617.20/x
  3. Step 3: Cross multiply
    15,331.44x = 21,157.26 × 8,617.20
  4. Step 4: Simplify right side
    15,331.44x = 182,316,340.87
  5. Step 5: Solve for x
    x = 182,316,340.87/15,331.44
  6. Step 6: Final answer
    x = 11,891.66

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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.