Home / 5,128.70-7,077.63-2,770.85

Finding the Fourth Proportional to 5,128.70, 7,077.63 and 2,770.85

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Solution

The fourth proportional to 5,128.70, 7,077.63 and 2,770.85 is: 3,823.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.70 : 7,077.63 = 2,770.85 : x
  2. Step 2: Convert to fraction form
    5,128.70/7,077.63 = 2,770.85/x
  3. Step 3: Cross multiply
    5,128.70x = 7,077.63 × 2,770.85
  4. Step 4: Simplify right side
    5,128.70x = 19,611,013.82
  5. Step 5: Solve for x
    x = 19,611,013.82/5,128.70
  6. Step 6: Final answer
    x = 3,823.78

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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.