Home / 15,979.31-22,052.20-8,905.78

Finding the Fourth Proportional to 15,979.31, 22,052.20 and 8,905.78

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Solution

The fourth proportional to 15,979.31, 22,052.20 and 8,905.78 is: 12,290.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,979.31 : 22,052.20 = 8,905.78 : x
  2. Step 2: Convert to fraction form
    15,979.31/22,052.20 = 8,905.78/x
  3. Step 3: Cross multiply
    15,979.31x = 22,052.20 × 8,905.78
  4. Step 4: Simplify right side
    15,979.31x = 196,392,063.72
  5. Step 5: Solve for x
    x = 196,392,063.72/15,979.31
  6. Step 6: Final answer
    x = 12,290.40

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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.