Home / 8,320.49-12,480.75-3,122.72

Finding the Fourth Proportional to 8,320.49, 12,480.75 and 3,122.72

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Solution

The fourth proportional to 8,320.49, 12,480.75 and 3,122.72 is: 4,684.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.49 : 12,480.75 = 3,122.72 : x
  2. Step 2: Convert to fraction form
    8,320.49/12,480.75 = 3,122.72/x
  3. Step 3: Cross multiply
    8,320.49x = 12,480.75 × 3,122.72
  4. Step 4: Simplify right side
    8,320.49x = 38,973,872.04
  5. Step 5: Solve for x
    x = 38,973,872.04/8,320.49
  6. Step 6: Final answer
    x = 4,684.08

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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.