Home / 20,107.05-27,749.70-11,154.57

Finding the Fourth Proportional to 20,107.05, 27,749.70 and 11,154.57

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Solution

The fourth proportional to 20,107.05, 27,749.70 and 11,154.57 is: 15,394.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.05 : 27,749.70 = 11,154.57 : x
  2. Step 2: Convert to fraction form
    20,107.05/27,749.70 = 11,154.57/x
  3. Step 3: Cross multiply
    20,107.05x = 27,749.70 × 11,154.57
  4. Step 4: Simplify right side
    20,107.05x = 309,535,971.13
  5. Step 5: Solve for x
    x = 309,535,971.13/20,107.05
  6. Step 6: Final answer
    x = 15,394.40

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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.