Home / 20,158.86-27,819.20-11,207.15

Finding the Fourth Proportional to 20,158.86, 27,819.20 and 11,207.15

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Solution

The fourth proportional to 20,158.86, 27,819.20 and 11,207.15 is: 15,465.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,158.86 : 27,819.20 = 11,207.15 : x
  2. Step 2: Convert to fraction form
    20,158.86/27,819.20 = 11,207.15/x
  3. Step 3: Cross multiply
    20,158.86x = 27,819.20 × 11,207.15
  4. Step 4: Simplify right side
    20,158.86x = 311,773,752.15
  5. Step 5: Solve for x
    x = 311,773,752.15/20,158.86
  6. Step 6: Final answer
    x = 15,465.84

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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.