Home / 20,581.79-28,403.01-11,150.36

Finding the Fourth Proportional to 20,581.79, 28,403.01 and 11,150.36

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Solution

The fourth proportional to 20,581.79, 28,403.01 and 11,150.36 is: 15,387.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.79 : 28,403.01 = 11,150.36 : x
  2. Step 2: Convert to fraction form
    20,581.79/28,403.01 = 11,150.36/x
  3. Step 3: Cross multiply
    20,581.79x = 28,403.01 × 11,150.36
  4. Step 4: Simplify right side
    20,581.79x = 316,703,644.57
  5. Step 5: Solve for x
    x = 316,703,644.57/20,581.79
  6. Step 6: Final answer
    x = 15,387.56

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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.