Home / 5,158.69-7,118.97-2,800.78

Finding the Fourth Proportional to 5,158.69, 7,118.97 and 2,800.78

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Solution

The fourth proportional to 5,158.69, 7,118.97 and 2,800.78 is: 3,865.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,158.69 : 7,118.97 = 2,800.78 : x
  2. Step 2: Convert to fraction form
    5,158.69/7,118.97 = 2,800.78/x
  3. Step 3: Cross multiply
    5,158.69x = 7,118.97 × 2,800.78
  4. Step 4: Simplify right side
    5,158.69x = 19,938,668.80
  5. Step 5: Solve for x
    x = 19,938,668.80/5,158.69
  6. Step 6: Final answer
    x = 3,865.06

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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.