Home / 15,489.32-21,375.58-8,416.20

Finding the Fourth Proportional to 15,489.32, 21,375.58 and 8,416.20

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Solution

The fourth proportional to 15,489.32, 21,375.58 and 8,416.20 is: 11,614.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.32 : 21,375.58 = 8,416.20 : x
  2. Step 2: Convert to fraction form
    15,489.32/21,375.58 = 8,416.20/x
  3. Step 3: Cross multiply
    15,489.32x = 21,375.58 × 8,416.20
  4. Step 4: Simplify right side
    15,489.32x = 179,901,156.40
  5. Step 5: Solve for x
    x = 179,901,156.40/15,489.32
  6. Step 6: Final answer
    x = 11,614.53

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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.