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Finding the Fourth Proportional to 18,641.28, 25,714.08 and 12,601.92

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Solution

The fourth proportional to 18,641.28, 25,714.08 and 12,601.92 is: 17,383.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,641.28 : 25,714.08 = 12,601.92 : x
  2. Step 2: Convert to fraction form
    18,641.28/25,714.08 = 12,601.92/x
  3. Step 3: Cross multiply
    18,641.28x = 25,714.08 × 12,601.92
  4. Step 4: Simplify right side
    18,641.28x = 324,046,779.03
  5. Step 5: Solve for x
    x = 324,046,779.03/18,641.28
  6. Step 6: Final answer
    x = 17,383.29

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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.