Home / 3,612.80-4,985.37-2,120.51

Finding the Fourth Proportional to 3,612.80, 4,985.37 and 2,120.51

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Solution

The fourth proportional to 3,612.80, 4,985.37 and 2,120.51 is: 2,926.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612.80 : 4,985.37 = 2,120.51 : x
  2. Step 2: Convert to fraction form
    3,612.80/4,985.37 = 2,120.51/x
  3. Step 3: Cross multiply
    3,612.80x = 4,985.37 × 2,120.51
  4. Step 4: Simplify right side
    3,612.80x = 10,571,526.94
  5. Step 5: Solve for x
    x = 10,571,526.94/3,612.80
  6. Step 6: Final answer
    x = 2,926.13

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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.