Home / 5,278.20-7,278.93-3,936.77

Finding the Fourth Proportional to 5,278.20, 7,278.93 and 3,936.77

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Solution

The fourth proportional to 5,278.20, 7,278.93 and 3,936.77 is: 5,429.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.20 : 7,278.93 = 3,936.77 : x
  2. Step 2: Convert to fraction form
    5,278.20/7,278.93 = 3,936.77/x
  3. Step 3: Cross multiply
    5,278.20x = 7,278.93 × 3,936.77
  4. Step 4: Simplify right side
    5,278.20x = 28,655,473.26
  5. Step 5: Solve for x
    x = 28,655,473.26/5,278.20
  6. Step 6: Final answer
    x = 5,429.02

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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.