Home / 15,489.72-21,375.77-8,416.17

Finding the Fourth Proportional to 15,489.72, 21,375.77 and 8,416.17

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Solution

The fourth proportional to 15,489.72, 21,375.77 and 8,416.17 is: 11,614.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.72 : 21,375.77 = 8,416.17 : x
  2. Step 2: Convert to fraction form
    15,489.72/21,375.77 = 8,416.17/x
  3. Step 3: Cross multiply
    15,489.72x = 21,375.77 × 8,416.17
  4. Step 4: Simplify right side
    15,489.72x = 179,902,072.12
  5. Step 5: Solve for x
    x = 179,902,072.12/15,489.72
  6. Step 6: Final answer
    x = 11,614.29

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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.