Home / 20,853.63-28,778.01-11,422.53

Finding the Fourth Proportional to 20,853.63, 28,778.01 and 11,422.53

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Solution

The fourth proportional to 20,853.63, 28,778.01 and 11,422.53 is: 15,763.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.63 : 28,778.01 = 11,422.53 : x
  2. Step 2: Convert to fraction form
    20,853.63/28,778.01 = 11,422.53/x
  3. Step 3: Cross multiply
    20,853.63x = 28,778.01 × 11,422.53
  4. Step 4: Simplify right side
    20,853.63x = 328,717,481.56
  5. Step 5: Solve for x
    x = 328,717,481.56/20,853.63
  6. Step 6: Final answer
    x = 15,763.09

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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.