Home / 20,102.61-27,742.85-11,150.11

Finding the Fourth Proportional to 20,102.61, 27,742.85 and 11,150.11

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Solution

The fourth proportional to 20,102.61, 27,742.85 and 11,150.11 is: 15,387.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.61 : 27,742.85 = 11,150.11 : x
  2. Step 2: Convert to fraction form
    20,102.61/27,742.85 = 11,150.11/x
  3. Step 3: Cross multiply
    20,102.61x = 27,742.85 × 11,150.11
  4. Step 4: Simplify right side
    20,102.61x = 309,335,829.21
  5. Step 5: Solve for x
    x = 309,335,829.21/20,102.61
  6. Step 6: Final answer
    x = 15,387.84

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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.