Home / 3,798.80-5,242.32-2,120.11

Finding the Fourth Proportional to 3,798.80, 5,242.32 and 2,120.11

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Solution

The fourth proportional to 3,798.80, 5,242.32 and 2,120.11 is: 2,925.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,798.80 : 5,242.32 = 2,120.11 : x
  2. Step 2: Convert to fraction form
    3,798.80/5,242.32 = 2,120.11/x
  3. Step 3: Cross multiply
    3,798.80x = 5,242.32 × 2,120.11
  4. Step 4: Simplify right side
    3,798.80x = 11,114,268.84
  5. Step 5: Solve for x
    x = 11,114,268.84/3,798.80
  6. Step 6: Final answer
    x = 2,925.74

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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.