Home / 15,202.50-20,979.30-8,487.72

Finding the Fourth Proportional to 15,202.50, 20,979.30 and 8,487.72

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Solution

The fourth proportional to 15,202.50, 20,979.30 and 8,487.72 is: 11,712.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,202.50 : 20,979.30 = 8,487.72 : x
  2. Step 2: Convert to fraction form
    15,202.50/20,979.30 = 8,487.72/x
  3. Step 3: Cross multiply
    15,202.50x = 20,979.30 × 8,487.72
  4. Step 4: Simplify right side
    15,202.50x = 178,066,424.20
  5. Step 5: Solve for x
    x = 178,066,424.20/15,202.50
  6. Step 6: Final answer
    x = 11,712.97

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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.