Home / 5,160.98-7,121.88-2,803.11

Finding the Fourth Proportional to 5,160.98, 7,121.88 and 2,803.11

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Solution

The fourth proportional to 5,160.98, 7,121.88 and 2,803.11 is: 3,868.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,160.98 : 7,121.88 = 2,803.11 : x
  2. Step 2: Convert to fraction form
    5,160.98/7,121.88 = 2,803.11/x
  3. Step 3: Cross multiply
    5,160.98x = 7,121.88 × 2,803.11
  4. Step 4: Simplify right side
    5,160.98x = 19,963,413.05
  5. Step 5: Solve for x
    x = 19,963,413.05/5,160.98
  6. Step 6: Final answer
    x = 3,868.15

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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.