Home / 15,115.41-20,857.44-8,400.18

Finding the Fourth Proportional to 15,115.41, 20,857.44 and 8,400.18

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Solution

The fourth proportional to 15,115.41, 20,857.44 and 8,400.18 is: 11,591.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,115.41 : 20,857.44 = 8,400.18 : x
  2. Step 2: Convert to fraction form
    15,115.41/20,857.44 = 8,400.18/x
  3. Step 3: Cross multiply
    15,115.41x = 20,857.44 × 8,400.18
  4. Step 4: Simplify right side
    15,115.41x = 175,206,250.34
  5. Step 5: Solve for x
    x = 175,206,250.34/15,115.41
  6. Step 6: Final answer
    x = 11,591.23

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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.