Home / 15,331.09-21,157.49-8,616.59

Finding the Fourth Proportional to 15,331.09, 21,157.49 and 8,616.59

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Solution

The fourth proportional to 15,331.09, 21,157.49 and 8,616.59 is: 11,891.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,331.09 : 21,157.49 = 8,616.59 : x
  2. Step 2: Convert to fraction form
    15,331.09/21,157.49 = 8,616.59/x
  3. Step 3: Cross multiply
    15,331.09x = 21,157.49 × 8,616.59
  4. Step 4: Simplify right side
    15,331.09x = 182,305,416.76
  5. Step 5: Solve for x
    x = 182,305,416.76/15,331.09
  6. Step 6: Final answer
    x = 11,891.22

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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.