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Finding the Fourth Proportional to 7,920.03, 10,919.71 and 5,082.40

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Solution

The fourth proportional to 7,920.03, 10,919.71 and 5,082.40 is: 7,007.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.03 : 10,919.71 = 5,082.40 : x
  2. Step 2: Convert to fraction form
    7,920.03/10,919.71 = 5,082.40/x
  3. Step 3: Cross multiply
    7,920.03x = 10,919.71 × 5,082.40
  4. Step 4: Simplify right side
    7,920.03x = 55,498,254.09
  5. Step 5: Solve for x
    x = 55,498,254.09/7,920.03
  6. Step 6: Final answer
    x = 7,007.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.