Home / 15,375.91-21,215.10-8,660.20

Finding the Fourth Proportional to 15,375.91, 21,215.10 and 8,660.20

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Solution

The fourth proportional to 15,375.91, 21,215.10 and 8,660.20 is: 11,949.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,375.91 : 21,215.10 = 8,660.20 : x
  2. Step 2: Convert to fraction form
    15,375.91/21,215.10 = 8,660.20/x
  3. Step 3: Cross multiply
    15,375.91x = 21,215.10 × 8,660.20
  4. Step 4: Simplify right side
    15,375.91x = 183,727,009.02
  5. Step 5: Solve for x
    x = 183,727,009.02/15,375.91
  6. Step 6: Final answer
    x = 11,949.02

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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.