Home / 20,113.28-27,756.78-11,160.65

Finding the Fourth Proportional to 20,113.28, 27,756.78 and 11,160.65

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Solution

The fourth proportional to 20,113.28, 27,756.78 and 11,160.65 is: 15,401.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,113.28 : 27,756.78 = 11,160.65 : x
  2. Step 2: Convert to fraction form
    20,113.28/27,756.78 = 11,160.65/x
  3. Step 3: Cross multiply
    20,113.28x = 27,756.78 × 11,160.65
  4. Step 4: Simplify right side
    20,113.28x = 309,783,734.25
  5. Step 5: Solve for x
    x = 309,783,734.25/20,113.28
  6. Step 6: Final answer
    x = 15,401.95

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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.