Home / 15,220.85-20,979.68-10,183.25

Finding the Fourth Proportional to 15,220.85, 20,979.68 and 10,183.25

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Solution

The fourth proportional to 15,220.85, 20,979.68 and 10,183.25 is: 14,036.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220.85 : 20,979.68 = 10,183.25 : x
  2. Step 2: Convert to fraction form
    15,220.85/20,979.68 = 10,183.25/x
  3. Step 3: Cross multiply
    15,220.85x = 20,979.68 × 10,183.25
  4. Step 4: Simplify right side
    15,220.85x = 213,641,327.89
  5. Step 5: Solve for x
    x = 213,641,327.89/15,220.85
  6. Step 6: Final answer
    x = 14,036.10

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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.