Home / 15,489.36-21,375.75-8,416.21

Finding the Fourth Proportional to 15,489.36, 21,375.75 and 8,416.21

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Solution

The fourth proportional to 15,489.36, 21,375.75 and 8,416.21 is: 11,614.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.36 : 21,375.75 = 8,416.21 : x
  2. Step 2: Convert to fraction form
    15,489.36/21,375.75 = 8,416.21/x
  3. Step 3: Cross multiply
    15,489.36x = 21,375.75 × 8,416.21
  4. Step 4: Simplify right side
    15,489.36x = 179,902,800.91
  5. Step 5: Solve for x
    x = 179,902,800.91/15,489.36
  6. Step 6: Final answer
    x = 11,614.61

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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.