Home / 8,115.04-11,188.56-6,621.44

Finding the Fourth Proportional to 8,115.04, 11,188.56 and 6,621.44

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Solution

The fourth proportional to 8,115.04, 11,188.56 and 6,621.44 is: 9,129.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.04 : 11,188.56 = 6,621.44 : x
  2. Step 2: Convert to fraction form
    8,115.04/11,188.56 = 6,621.44/x
  3. Step 3: Cross multiply
    8,115.04x = 11,188.56 × 6,621.44
  4. Step 4: Simplify right side
    8,115.04x = 74,084,378.73
  5. Step 5: Solve for x
    x = 74,084,378.73/8,115.04
  6. Step 6: Final answer
    x = 9,129.27

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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.