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Finding the Fourth Proportional to 9,321.80, 13,979.26 and 3,478.28

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Solution

The fourth proportional to 9,321.80, 13,979.26 and 3,478.28 is: 5,216.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,321.80 : 13,979.26 = 3,478.28 : x
  2. Step 2: Convert to fraction form
    9,321.80/13,979.26 = 3,478.28/x
  3. Step 3: Cross multiply
    9,321.80x = 13,979.26 × 3,478.28
  4. Step 4: Simplify right side
    9,321.80x = 48,623,780.47
  5. Step 5: Solve for x
    x = 48,623,780.47/9,321.80
  6. Step 6: Final answer
    x = 5,216.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.