Home / 5,109.85-7,051.61-2,872.49

Finding the Fourth Proportional to 5,109.85, 7,051.61 and 2,872.49

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Solution

The fourth proportional to 5,109.85, 7,051.61 and 2,872.49 is: 3,964.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,109.85 : 7,051.61 = 2,872.49 : x
  2. Step 2: Convert to fraction form
    5,109.85/7,051.61 = 2,872.49/x
  3. Step 3: Cross multiply
    5,109.85x = 7,051.61 × 2,872.49
  4. Step 4: Simplify right side
    5,109.85x = 20,255,704.02
  5. Step 5: Solve for x
    x = 20,255,704.02/5,109.85
  6. Step 6: Final answer
    x = 3,964.05

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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.