Home / 5,109.78-7,051.32-2,871.66

Finding the Fourth Proportional to 5,109.78, 7,051.32 and 2,871.66

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Solution

The fourth proportional to 5,109.78, 7,051.32 and 2,871.66 is: 3,962.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,109.78 : 7,051.32 = 2,871.66 : x
  2. Step 2: Convert to fraction form
    5,109.78/7,051.32 = 2,871.66/x
  3. Step 3: Cross multiply
    5,109.78x = 7,051.32 × 2,871.66
  4. Step 4: Simplify right side
    5,109.78x = 20,248,993.59
  5. Step 5: Solve for x
    x = 20,248,993.59/5,109.78
  6. Step 6: Final answer
    x = 3,962.79

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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.