Home / 2,810.80-4,212.92-2,115.23

Finding the Fourth Proportional to 2,810.80, 4,212.92 and 2,115.23

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Solution

The fourth proportional to 2,810.80, 4,212.92 and 2,115.23 is: 3,170.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.80 : 4,212.92 = 2,115.23 : x
  2. Step 2: Convert to fraction form
    2,810.80/4,212.92 = 2,115.23/x
  3. Step 3: Cross multiply
    2,810.80x = 4,212.92 × 2,115.23
  4. Step 4: Simplify right side
    2,810.80x = 8,911,294.77
  5. Step 5: Solve for x
    x = 8,911,294.77/2,810.80
  6. Step 6: Final answer
    x = 3,170.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.