Home / 8,112.87-11,180.01-5,421.05

Finding the Fourth Proportional to 8,112.87, 11,180.01 and 5,421.05

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Solution

The fourth proportional to 8,112.87, 11,180.01 and 5,421.05 is: 7,470.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,112.87 : 11,180.01 = 5,421.05 : x
  2. Step 2: Convert to fraction form
    8,112.87/11,180.01 = 5,421.05/x
  3. Step 3: Cross multiply
    8,112.87x = 11,180.01 × 5,421.05
  4. Step 4: Simplify right side
    8,112.87x = 60,607,337.31
  5. Step 5: Solve for x
    x = 60,607,337.31/8,112.87
  6. Step 6: Final answer
    x = 7,470.52

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Half scale
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Double scale
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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.