Home / 15,202.35-20,979.75-8,488.05

Finding the Fourth Proportional to 15,202.35, 20,979.75 and 8,488.05

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Solution

The fourth proportional to 15,202.35, 20,979.75 and 8,488.05 is: 11,713.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,202.35 : 20,979.75 = 8,488.05 : x
  2. Step 2: Convert to fraction form
    15,202.35/20,979.75 = 8,488.05/x
  3. Step 3: Cross multiply
    15,202.35x = 20,979.75 × 8,488.05
  4. Step 4: Simplify right side
    15,202.35x = 178,077,166.99
  5. Step 5: Solve for x
    x = 178,077,166.99/15,202.35
  6. Step 6: Final answer
    x = 11,713.79

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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.