Home / 5,158.62-7,118.91-2,800.80

Finding the Fourth Proportional to 5,158.62, 7,118.91 and 2,800.80

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Solution

The fourth proportional to 5,158.62, 7,118.91 and 2,800.80 is: 3,865.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,158.62 : 7,118.91 = 2,800.80 : x
  2. Step 2: Convert to fraction form
    5,158.62/7,118.91 = 2,800.80/x
  3. Step 3: Cross multiply
    5,158.62x = 7,118.91 × 2,800.80
  4. Step 4: Simplify right side
    5,158.62x = 19,938,643.13
  5. Step 5: Solve for x
    x = 19,938,643.13/5,158.62
  6. Step 6: Final answer
    x = 3,865.11

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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.