Home / 11,151.07-15,388.65-6,115.75

Finding the Fourth Proportional to 11,151.07, 15,388.65 and 6,115.75

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Solution

The fourth proportional to 11,151.07, 15,388.65 and 6,115.75 is: 8,439.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,151.07 : 15,388.65 = 6,115.75 : x
  2. Step 2: Convert to fraction form
    11,151.07/15,388.65 = 6,115.75/x
  3. Step 3: Cross multiply
    11,151.07x = 15,388.65 × 6,115.75
  4. Step 4: Simplify right side
    11,151.07x = 94,113,136.24
  5. Step 5: Solve for x
    x = 94,113,136.24/11,151.07
  6. Step 6: Final answer
    x = 8,439.83

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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.