Home / 5,121.45-7,670.84-2,928.78

Finding the Fourth Proportional to 5,121.45, 7,670.84 and 2,928.78

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Solution

The fourth proportional to 5,121.45, 7,670.84 and 2,928.78 is: 4,386.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.45 : 7,670.84 = 2,928.78 : x
  2. Step 2: Convert to fraction form
    5,121.45/7,670.84 = 2,928.78/x
  3. Step 3: Cross multiply
    5,121.45x = 7,670.84 × 2,928.78
  4. Step 4: Simplify right side
    5,121.45x = 22,466,188.13
  5. Step 5: Solve for x
    x = 22,466,188.13/5,121.45
  6. Step 6: Final answer
    x = 4,386.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.