Home / 8,121.39-12,173.69-3,122.40

Finding the Fourth Proportional to 8,121.39, 12,173.69 and 3,122.40

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Solution

The fourth proportional to 8,121.39, 12,173.69 and 3,122.40 is: 4,680.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.39 : 12,173.69 = 3,122.40 : x
  2. Step 2: Convert to fraction form
    8,121.39/12,173.69 = 3,122.40/x
  3. Step 3: Cross multiply
    8,121.39x = 12,173.69 × 3,122.40
  4. Step 4: Simplify right side
    8,121.39x = 38,011,114.04
  5. Step 5: Solve for x
    x = 38,011,114.04/8,121.39
  6. Step 6: Final answer
    x = 4,680.37

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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.