Home / 15,116.32-20,860.39-8,401.78

Finding the Fourth Proportional to 15,116.32, 20,860.39 and 8,401.78

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Solution

The fourth proportional to 15,116.32, 20,860.39 and 8,401.78 is: 11,594.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,116.32 : 20,860.39 = 8,401.78 : x
  2. Step 2: Convert to fraction form
    15,116.32/20,860.39 = 8,401.78/x
  3. Step 3: Cross multiply
    15,116.32x = 20,860.39 × 8,401.78
  4. Step 4: Simplify right side
    15,116.32x = 175,264,279.47
  5. Step 5: Solve for x
    x = 175,264,279.47/15,116.32
  6. Step 6: Final answer
    x = 11,594.37

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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.