Home / 20,427.96-28,182.42-12,872.28

Finding the Fourth Proportional to 20,427.96, 28,182.42 and 12,872.28

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Solution

The fourth proportional to 20,427.96, 28,182.42 and 12,872.28 is: 17,758.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.96 : 28,182.42 = 12,872.28 : x
  2. Step 2: Convert to fraction form
    20,427.96/28,182.42 = 12,872.28/x
  3. Step 3: Cross multiply
    20,427.96x = 28,182.42 × 12,872.28
  4. Step 4: Simplify right side
    20,427.96x = 362,772,001.32
  5. Step 5: Solve for x
    x = 362,772,001.32/20,427.96
  6. Step 6: Final answer
    x = 17,758.60

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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.