Home / 5,111.12-7,051.80-2,872.76

Finding the Fourth Proportional to 5,111.12, 7,051.80 and 2,872.76

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Solution

The fourth proportional to 5,111.12, 7,051.80 and 2,872.76 is: 3,963.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,111.12 : 7,051.80 = 2,872.76 : x
  2. Step 2: Convert to fraction form
    5,111.12/7,051.80 = 2,872.76/x
  3. Step 3: Cross multiply
    5,111.12x = 7,051.80 × 2,872.76
  4. Step 4: Simplify right side
    5,111.12x = 20,258,128.97
  5. Step 5: Solve for x
    x = 20,258,128.97/5,111.12
  6. Step 6: Final answer
    x = 3,963.54

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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.