Home / 15,375.19-21,217.85-8,660.91

Finding the Fourth Proportional to 15,375.19, 21,217.85 and 8,660.91

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Solution

The fourth proportional to 15,375.19, 21,217.85 and 8,660.91 is: 11,952.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,375.19 : 21,217.85 = 8,660.91 : x
  2. Step 2: Convert to fraction form
    15,375.19/21,217.85 = 8,660.91/x
  3. Step 3: Cross multiply
    15,375.19x = 21,217.85 × 8,660.91
  4. Step 4: Simplify right side
    15,375.19x = 183,765,889.24
  5. Step 5: Solve for x
    x = 183,765,889.24/15,375.19
  6. Step 6: Final answer
    x = 11,952.11

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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.