Home / 20,828.88-28,743.85-11,397.44

Finding the Fourth Proportional to 20,828.88, 28,743.85 and 11,397.44

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Solution

The fourth proportional to 20,828.88, 28,743.85 and 11,397.44 is: 15,728.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.88 : 28,743.85 = 11,397.44 : x
  2. Step 2: Convert to fraction form
    20,828.88/28,743.85 = 11,397.44/x
  3. Step 3: Cross multiply
    20,828.88x = 28,743.85 × 11,397.44
  4. Step 4: Simplify right side
    20,828.88x = 327,606,305.74
  5. Step 5: Solve for x
    x = 327,606,305.74/20,828.88
  6. Step 6: Final answer
    x = 15,728.46

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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.