Home / 20,427.72-28,203.30-15,943.56

Finding the Fourth Proportional to 20,427.72, 28,203.30 and 15,943.56

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Solution

The fourth proportional to 20,427.72, 28,203.30 and 15,943.56 is: 22,012.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.72 : 28,203.30 = 15,943.56 : x
  2. Step 2: Convert to fraction form
    20,427.72/28,203.30 = 15,943.56/x
  3. Step 3: Cross multiply
    20,427.72x = 28,203.30 × 15,943.56
  4. Step 4: Simplify right side
    20,427.72x = 449,661,005.75
  5. Step 5: Solve for x
    x = 449,661,005.75/20,427.72
  6. Step 6: Final answer
    x = 22,012.30

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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.