Home / 15,115.92-20,857.47-8,401.37

Finding the Fourth Proportional to 15,115.92, 20,857.47 and 8,401.37

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Solution

The fourth proportional to 15,115.92, 20,857.47 and 8,401.37 is: 11,592.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,115.92 : 20,857.47 = 8,401.37 : x
  2. Step 2: Convert to fraction form
    15,115.92/20,857.47 = 8,401.37/x
  3. Step 3: Cross multiply
    15,115.92x = 20,857.47 × 8,401.37
  4. Step 4: Simplify right side
    15,115.92x = 175,231,218.45
  5. Step 5: Solve for x
    x = 175,231,218.45/15,115.92
  6. Step 6: Final answer
    x = 11,592.49

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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.