Home / 3,074.95-4,242.49-2,129.28

Finding the Fourth Proportional to 3,074.95, 4,242.49 and 2,129.28

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Solution

The fourth proportional to 3,074.95, 4,242.49 and 2,129.28 is: 2,937.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,074.95 : 4,242.49 = 2,129.28 : x
  2. Step 2: Convert to fraction form
    3,074.95/4,242.49 = 2,129.28/x
  3. Step 3: Cross multiply
    3,074.95x = 4,242.49 × 2,129.28
  4. Step 4: Simplify right side
    3,074.95x = 9,033,449.11
  5. Step 5: Solve for x
    x = 9,033,449.11/3,074.95
  6. Step 6: Final answer
    x = 2,937.75

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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.