Home / 3,686.80-5,088.48-2,115.92

Finding the Fourth Proportional to 3,686.80, 5,088.48 and 2,115.92

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Solution

The fourth proportional to 3,686.80, 5,088.48 and 2,115.92 is: 2,920.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,686.80 : 5,088.48 = 2,115.92 : x
  2. Step 2: Convert to fraction form
    3,686.80/5,088.48 = 2,115.92/x
  3. Step 3: Cross multiply
    3,686.80x = 5,088.48 × 2,115.92
  4. Step 4: Simplify right side
    3,686.80x = 10,766,816.60
  5. Step 5: Solve for x
    x = 10,766,816.60/3,686.80
  6. Step 6: Final answer
    x = 2,920.37

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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.