Home / 21,010.38-28,996.14-11,580.76

Finding the Fourth Proportional to 21,010.38, 28,996.14 and 11,580.76

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Solution

The fourth proportional to 21,010.38, 28,996.14 and 11,580.76 is: 15,982.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.38 : 28,996.14 = 11,580.76 : x
  2. Step 2: Convert to fraction form
    21,010.38/28,996.14 = 11,580.76/x
  3. Step 3: Cross multiply
    21,010.38x = 28,996.14 × 11,580.76
  4. Step 4: Simplify right side
    21,010.38x = 335,797,338.27
  5. Step 5: Solve for x
    x = 335,797,338.27/21,010.38
  6. Step 6: Final answer
    x = 15,982.45

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1.5x scale

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.