Home / 15,979.28-22,051.92-8,905.52

Finding the Fourth Proportional to 15,979.28, 22,051.92 and 8,905.52

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Solution

The fourth proportional to 15,979.28, 22,051.92 and 8,905.52 is: 12,289.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,979.28 : 22,051.92 = 8,905.52 : x
  2. Step 2: Convert to fraction form
    15,979.28/22,051.92 = 8,905.52/x
  3. Step 3: Cross multiply
    15,979.28x = 22,051.92 × 8,905.52
  4. Step 4: Simplify right side
    15,979.28x = 196,383,814.60
  5. Step 5: Solve for x
    x = 196,383,814.60/15,979.28
  6. Step 6: Final answer
    x = 12,289.90

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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.