Home / 21,013.22-28,996.86-11,581.76

Finding the Fourth Proportional to 21,013.22, 28,996.86 and 11,581.76

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Solution

The fourth proportional to 21,013.22, 28,996.86 and 11,581.76 is: 15,982.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.22 : 28,996.86 = 11,581.76 : x
  2. Step 2: Convert to fraction form
    21,013.22/28,996.86 = 11,581.76/x
  3. Step 3: Cross multiply
    21,013.22x = 28,996.86 × 11,581.76
  4. Step 4: Simplify right side
    21,013.22x = 335,834,673.27
  5. Step 5: Solve for x
    x = 335,834,673.27/21,013.22
  6. Step 6: Final answer
    x = 15,982.07

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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.