Home / 5,121.63-7,065.02-3,103.72

Finding the Fourth Proportional to 5,121.63, 7,065.02 and 3,103.72

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Solution

The fourth proportional to 5,121.63, 7,065.02 and 3,103.72 is: 4,281.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.63 : 7,065.02 = 3,103.72 : x
  2. Step 2: Convert to fraction form
    5,121.63/7,065.02 = 3,103.72/x
  3. Step 3: Cross multiply
    5,121.63x = 7,065.02 × 3,103.72
  4. Step 4: Simplify right side
    5,121.63x = 21,927,833.97
  5. Step 5: Solve for x
    x = 21,927,833.97/5,121.63
  6. Step 6: Final answer
    x = 4,281.42

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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.