Home / 21,013.22-28,998.18-11,581.78

Finding the Fourth Proportional to 21,013.22, 28,998.18 and 11,581.78

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Solution

The fourth proportional to 21,013.22, 28,998.18 and 11,581.78 is: 15,982.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.22 : 28,998.18 = 11,581.78 : x
  2. Step 2: Convert to fraction form
    21,013.22/28,998.18 = 11,581.78/x
  3. Step 3: Cross multiply
    21,013.22x = 28,998.18 × 11,581.78
  4. Step 4: Simplify right side
    21,013.22x = 335,850,541.16
  5. Step 5: Solve for x
    x = 335,850,541.16/21,013.22
  6. Step 6: Final answer
    x = 15,982.82

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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.