Home / 20,975.13-28,945.68-11,543.49

Finding the Fourth Proportional to 20,975.13, 28,945.68 and 11,543.49

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Solution

The fourth proportional to 20,975.13, 28,945.68 and 11,543.49 is: 15,930.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,975.13 : 28,945.68 = 11,543.49 : x
  2. Step 2: Convert to fraction form
    20,975.13/28,945.68 = 11,543.49/x
  3. Step 3: Cross multiply
    20,975.13x = 28,945.68 × 11,543.49
  4. Step 4: Simplify right side
    20,975.13x = 334,134,167.62
  5. Step 5: Solve for x
    x = 334,134,167.62/20,975.13
  6. Step 6: Final answer
    x = 15,930.02

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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.