Home / 11,109.78-15,331.05-6,394.86

Finding the Fourth Proportional to 11,109.78, 15,331.05 and 6,394.86

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Solution

The fourth proportional to 11,109.78, 15,331.05 and 6,394.86 is: 8,824.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,109.78 : 15,331.05 = 6,394.86 : x
  2. Step 2: Convert to fraction form
    11,109.78/15,331.05 = 6,394.86/x
  3. Step 3: Cross multiply
    11,109.78x = 15,331.05 × 6,394.86
  4. Step 4: Simplify right side
    11,109.78x = 98,039,918.40
  5. Step 5: Solve for x
    x = 98,039,918.40/11,109.78
  6. Step 6: Final answer
    x = 8,824.65

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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.