Home / 8,181.60-11,290.32-5,385.12

Finding the Fourth Proportional to 8,181.60, 11,290.32 and 5,385.12

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Solution

The fourth proportional to 8,181.60, 11,290.32 and 5,385.12 is: 7,431.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,181.60 : 11,290.32 = 5,385.12 : x
  2. Step 2: Convert to fraction form
    8,181.60/11,290.32 = 5,385.12/x
  3. Step 3: Cross multiply
    8,181.60x = 11,290.32 × 5,385.12
  4. Step 4: Simplify right side
    8,181.60x = 60,799,728.04
  5. Step 5: Solve for x
    x = 60,799,728.04/8,181.60
  6. Step 6: Final answer
    x = 7,431.28

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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.