Home / 7,321.25-10,981.88-3,428.39

Finding the Fourth Proportional to 7,321.25, 10,981.88 and 3,428.39

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Solution

The fourth proportional to 7,321.25, 10,981.88 and 3,428.39 is: 5,142.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.25 : 10,981.88 = 3,428.39 : x
  2. Step 2: Convert to fraction form
    7,321.25/10,981.88 = 3,428.39/x
  3. Step 3: Cross multiply
    7,321.25x = 10,981.88 × 3,428.39
  4. Step 4: Simplify right side
    7,321.25x = 37,650,095.52
  5. Step 5: Solve for x
    x = 37,650,095.52/7,321.25
  6. Step 6: Final answer
    x = 5,142.58

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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.