Home / 15,215.38-20,995.74-8,840.32

Finding the Fourth Proportional to 15,215.38, 20,995.74 and 8,840.32

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Solution

The fourth proportional to 15,215.38, 20,995.74 and 8,840.32 is: 12,198.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,215.38 : 20,995.74 = 8,840.32 : x
  2. Step 2: Convert to fraction form
    15,215.38/20,995.74 = 8,840.32/x
  3. Step 3: Cross multiply
    15,215.38x = 20,995.74 × 8,840.32
  4. Step 4: Simplify right side
    15,215.38x = 185,609,060.24
  5. Step 5: Solve for x
    x = 185,609,060.24/15,215.38
  6. Step 6: Final answer
    x = 12,198.78

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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.