Home / 5,278.64-7,920.38-2,683.40

Finding the Fourth Proportional to 5,278.64, 7,920.38 and 2,683.40

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Solution

The fourth proportional to 5,278.64, 7,920.38 and 2,683.40 is: 4,026.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.64 : 7,920.38 = 2,683.40 : x
  2. Step 2: Convert to fraction form
    5,278.64/7,920.38 = 2,683.40/x
  3. Step 3: Cross multiply
    5,278.64x = 7,920.38 × 2,683.40
  4. Step 4: Simplify right side
    5,278.64x = 21,253,514.80
  5. Step 5: Solve for x
    x = 21,253,514.80/5,278.64
  6. Step 6: Final answer
    x = 4,026.33

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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.