Home / 5,122.80-7,069.36-2,884.66

Finding the Fourth Proportional to 5,122.80, 7,069.36 and 2,884.66

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Solution

The fourth proportional to 5,122.80, 7,069.36 and 2,884.66 is: 3,980.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,122.80 : 7,069.36 = 2,884.66 : x
  2. Step 2: Convert to fraction form
    5,122.80/7,069.36 = 2,884.66/x
  3. Step 3: Cross multiply
    5,122.80x = 7,069.36 × 2,884.66
  4. Step 4: Simplify right side
    5,122.80x = 20,392,700.02
  5. Step 5: Solve for x
    x = 20,392,700.02/5,122.80
  6. Step 6: Final answer
    x = 3,980.77

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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.