Home / 5,128.71-7,077.62-2,770.84

Finding the Fourth Proportional to 5,128.71, 7,077.62 and 2,770.84

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Solution

The fourth proportional to 5,128.71, 7,077.62 and 2,770.84 is: 3,823.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.71 : 7,077.62 = 2,770.84 : x
  2. Step 2: Convert to fraction form
    5,128.71/7,077.62 = 2,770.84/x
  3. Step 3: Cross multiply
    5,128.71x = 7,077.62 × 2,770.84
  4. Step 4: Simplify right side
    5,128.71x = 19,610,952.60
  5. Step 5: Solve for x
    x = 19,610,952.60/5,128.71
  6. Step 6: Final answer
    x = 3,823.76

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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.