Home / 15,930.39-21,983.82-8,856.75

Finding the Fourth Proportional to 15,930.39, 21,983.82 and 8,856.75

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Solution

The fourth proportional to 15,930.39, 21,983.82 and 8,856.75 is: 12,222.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,930.39 : 21,983.82 = 8,856.75 : x
  2. Step 2: Convert to fraction form
    15,930.39/21,983.82 = 8,856.75/x
  3. Step 3: Cross multiply
    15,930.39x = 21,983.82 × 8,856.75
  4. Step 4: Simplify right side
    15,930.39x = 194,705,197.79
  5. Step 5: Solve for x
    x = 194,705,197.79/15,930.39
  6. Step 6: Final answer
    x = 12,222.25

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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.