Home / 20,829.72-28,744.44-11,398.08

Finding the Fourth Proportional to 20,829.72, 28,744.44 and 11,398.08

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Solution

The fourth proportional to 20,829.72, 28,744.44 and 11,398.08 is: 15,729.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.72 : 28,744.44 = 11,398.08 : x
  2. Step 2: Convert to fraction form
    20,829.72/28,744.44 = 11,398.08/x
  3. Step 3: Cross multiply
    20,829.72x = 28,744.44 × 11,398.08
  4. Step 4: Simplify right side
    20,829.72x = 327,631,426.68
  5. Step 5: Solve for x
    x = 327,631,426.68/20,829.72
  6. Step 6: Final answer
    x = 15,729.04

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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.