Home / 3,907.80-5,390.55-2,581.02

Finding the Fourth Proportional to 3,907.80, 5,390.55 and 2,581.02

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Solution

The fourth proportional to 3,907.80, 5,390.55 and 2,581.02 is: 3,560.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,907.80 : 5,390.55 = 2,581.02 : x
  2. Step 2: Convert to fraction form
    3,907.80/5,390.55 = 2,581.02/x
  3. Step 3: Cross multiply
    3,907.80x = 5,390.55 × 2,581.02
  4. Step 4: Simplify right side
    3,907.80x = 13,913,117.36
  5. Step 5: Solve for x
    x = 13,913,117.36/3,907.80
  6. Step 6: Final answer
    x = 3,560.35

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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.