Home / 20,947.38-28,907.48-11,387.36

Finding the Fourth Proportional to 20,947.38, 28,907.48 and 11,387.36

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Solution

The fourth proportional to 20,947.38, 28,907.48 and 11,387.36 is: 15,714.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.38 : 28,907.48 = 11,387.36 : x
  2. Step 2: Convert to fraction form
    20,947.38/28,907.48 = 11,387.36/x
  3. Step 3: Cross multiply
    20,947.38x = 28,907.48 × 11,387.36
  4. Step 4: Simplify right side
    20,947.38x = 329,179,881.45
  5. Step 5: Solve for x
    x = 329,179,881.45/20,947.38
  6. Step 6: Final answer
    x = 15,714.61

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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.