Home / 15,118.44-20,864.76-8,405.38

Finding the Fourth Proportional to 15,118.44, 20,864.76 and 8,405.38

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Solution

The fourth proportional to 15,118.44, 20,864.76 and 8,405.38 is: 11,600.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,118.44 : 20,864.76 = 8,405.38 : x
  2. Step 2: Convert to fraction form
    15,118.44/20,864.76 = 8,405.38/x
  3. Step 3: Cross multiply
    15,118.44x = 20,864.76 × 8,405.38
  4. Step 4: Simplify right side
    15,118.44x = 175,376,236.41
  5. Step 5: Solve for x
    x = 175,376,236.41/15,118.44
  6. Step 6: Final answer
    x = 11,600.15

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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.