Home / 15,115.72-20,856.48-8,399.94

Finding the Fourth Proportional to 15,115.72, 20,856.48 and 8,399.94

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Solution

The fourth proportional to 15,115.72, 20,856.48 and 8,399.94 is: 11,590.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,115.72 : 20,856.48 = 8,399.94 : x
  2. Step 2: Convert to fraction form
    15,115.72/20,856.48 = 8,399.94/x
  3. Step 3: Cross multiply
    15,115.72x = 20,856.48 × 8,399.94
  4. Step 4: Simplify right side
    15,115.72x = 175,193,180.61
  5. Step 5: Solve for x
    x = 175,193,180.61/15,115.72
  6. Step 6: Final answer
    x = 11,590.13

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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.