Home / 7,320.12-10,981.88-2,125.84

Finding the Fourth Proportional to 7,320.12, 10,981.88 and 2,125.84

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Solution

The fourth proportional to 7,320.12, 10,981.88 and 2,125.84 is: 3,189.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,320.12 : 10,981.88 = 2,125.84 : x
  2. Step 2: Convert to fraction form
    7,320.12/10,981.88 = 2,125.84/x
  3. Step 3: Cross multiply
    7,320.12x = 10,981.88 × 2,125.84
  4. Step 4: Simplify right side
    7,320.12x = 23,345,719.78
  5. Step 5: Solve for x
    x = 23,345,719.78/7,320.12
  6. Step 6: Final answer
    x = 3,189.25

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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.