Home / 20,939.96-28,897.16-11,508.52

Finding the Fourth Proportional to 20,939.96, 28,897.16 and 11,508.52

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Solution

The fourth proportional to 20,939.96, 28,897.16 and 11,508.52 is: 15,881.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.96 : 28,897.16 = 11,508.52 : x
  2. Step 2: Convert to fraction form
    20,939.96/28,897.16 = 11,508.52/x
  3. Step 3: Cross multiply
    20,939.96x = 28,897.16 × 11,508.52
  4. Step 4: Simplify right side
    20,939.96x = 332,563,543.80
  5. Step 5: Solve for x
    x = 332,563,543.80/20,939.96
  6. Step 6: Final answer
    x = 15,881.77

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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.