Home / 20,828.22-28,744.92-11,398.20

Finding the Fourth Proportional to 20,828.22, 28,744.92 and 11,398.20

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Solution

The fourth proportional to 20,828.22, 28,744.92 and 11,398.20 is: 15,730.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.22 : 28,744.92 = 11,398.20 : x
  2. Step 2: Convert to fraction form
    20,828.22/28,744.92 = 11,398.20/x
  3. Step 3: Cross multiply
    20,828.22x = 28,744.92 × 11,398.20
  4. Step 4: Simplify right side
    20,828.22x = 327,640,347.14
  5. Step 5: Solve for x
    x = 327,640,347.14/20,828.22
  6. Step 6: Final answer
    x = 15,730.60

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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.