Home / 20,339.82-28,065.72-11,387.70

Finding the Fourth Proportional to 20,339.82, 28,065.72 and 11,387.70

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Solution

The fourth proportional to 20,339.82, 28,065.72 and 11,387.70 is: 15,713.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,339.82 : 28,065.72 = 11,387.70 : x
  2. Step 2: Convert to fraction form
    20,339.82/28,065.72 = 11,387.70/x
  3. Step 3: Cross multiply
    20,339.82x = 28,065.72 × 11,387.70
  4. Step 4: Simplify right side
    20,339.82x = 319,603,999.64
  5. Step 5: Solve for x
    x = 319,603,999.64/20,339.82
  6. Step 6: Final answer
    x = 15,713.22

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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.