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Finding the Fourth Proportional to 15,115.37, 20,859.39 and 8,401.41

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Solution

The fourth proportional to 15,115.37, 20,859.39 and 8,401.41 is: 11,594.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,115.37 : 20,859.39 = 8,401.41 : x
  2. Step 2: Convert to fraction form
    15,115.37/20,859.39 = 8,401.41/x
  3. Step 3: Cross multiply
    15,115.37x = 20,859.39 × 8,401.41
  4. Step 4: Simplify right side
    15,115.37x = 175,248,287.74
  5. Step 5: Solve for x
    x = 175,248,287.74/15,115.37
  6. Step 6: Final answer
    x = 11,594.05

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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.