Home / 8,321.52-11,478.60-5,670.12

Finding the Fourth Proportional to 8,321.52, 11,478.60 and 5,670.12

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Solution

The fourth proportional to 8,321.52, 11,478.60 and 5,670.12 is: 7,821.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,321.52 : 11,478.60 = 5,670.12 : x
  2. Step 2: Convert to fraction form
    8,321.52/11,478.60 = 5,670.12/x
  3. Step 3: Cross multiply
    8,321.52x = 11,478.60 × 5,670.12
  4. Step 4: Simplify right side
    8,321.52x = 65,085,039.43
  5. Step 5: Solve for x
    x = 65,085,039.43/8,321.52
  6. Step 6: Final answer
    x = 7,821.29

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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.