Home / 20,572.86-28,390.56-11,141.46

Finding the Fourth Proportional to 20,572.86, 28,390.56 and 11,141.46

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Solution

The fourth proportional to 20,572.86, 28,390.56 and 11,141.46 is: 15,375.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.86 : 28,390.56 = 11,141.46 : x
  2. Step 2: Convert to fraction form
    20,572.86/28,390.56 = 11,141.46/x
  3. Step 3: Cross multiply
    20,572.86x = 28,390.56 × 11,141.46
  4. Step 4: Simplify right side
    20,572.86x = 316,312,288.62
  5. Step 5: Solve for x
    x = 316,312,288.62/20,572.86
  6. Step 6: Final answer
    x = 15,375.22

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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.