Home / 11,138.60-15,363.86-7,164.74

Finding the Fourth Proportional to 11,138.60, 15,363.86 and 7,164.74

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Solution

The fourth proportional to 11,138.60, 15,363.86 and 7,164.74 is: 9,882.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,138.60 : 15,363.86 = 7,164.74 : x
  2. Step 2: Convert to fraction form
    11,138.60/15,363.86 = 7,164.74/x
  3. Step 3: Cross multiply
    11,138.60x = 15,363.86 × 7,164.74
  4. Step 4: Simplify right side
    11,138.60x = 110,078,062.30
  5. Step 5: Solve for x
    x = 110,078,062.30/11,138.60
  6. Step 6: Final answer
    x = 9,882.58

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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.