Home / 20,581.89-28,402.83-11,150.43

Finding the Fourth Proportional to 20,581.89, 28,402.83 and 11,150.43

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Solution

The fourth proportional to 20,581.89, 28,402.83 and 11,150.43 is: 15,387.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.89 : 28,402.83 = 11,150.43 : x
  2. Step 2: Convert to fraction form
    20,581.89/28,402.83 = 11,150.43/x
  3. Step 3: Cross multiply
    20,581.89x = 28,402.83 × 11,150.43
  4. Step 4: Simplify right side
    20,581.89x = 316,703,767.72
  5. Step 5: Solve for x
    x = 316,703,767.72/20,581.89
  6. Step 6: Final answer
    x = 15,387.50

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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.