Home / 20,947.56-28,907.33-11,387.54

Finding the Fourth Proportional to 20,947.56, 28,907.33 and 11,387.54

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Solution

The fourth proportional to 20,947.56, 28,907.33 and 11,387.54 is: 15,714.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.56 : 28,907.33 = 11,387.54 : x
  2. Step 2: Convert to fraction form
    20,947.56/28,907.33 = 11,387.54/x
  3. Step 3: Cross multiply
    20,947.56x = 28,907.33 × 11,387.54
  4. Step 4: Simplify right side
    20,947.56x = 329,183,175.19
  5. Step 5: Solve for x
    x = 329,183,175.19/20,947.56
  6. Step 6: Final answer
    x = 15,714.63

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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.