Home / 5,121.75-7,065.93-3,780.57

Finding the Fourth Proportional to 5,121.75, 7,065.93 and 3,780.57

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Solution

The fourth proportional to 5,121.75, 7,065.93 and 3,780.57 is: 5,215.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.75 : 7,065.93 = 3,780.57 : x
  2. Step 2: Convert to fraction form
    5,121.75/7,065.93 = 3,780.57/x
  3. Step 3: Cross multiply
    5,121.75x = 7,065.93 × 3,780.57
  4. Step 4: Simplify right side
    5,121.75x = 26,713,242.98
  5. Step 5: Solve for x
    x = 26,713,242.98/5,121.75
  6. Step 6: Final answer
    x = 5,215.65

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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.