Home / 3,928.75-5,418.95-2,669.10

Finding the Fourth Proportional to 3,928.75, 5,418.95 and 2,669.10

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Solution

The fourth proportional to 3,928.75, 5,418.95 and 2,669.10 is: 3,681.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.75 : 5,418.95 = 2,669.10 : x
  2. Step 2: Convert to fraction form
    3,928.75/5,418.95 = 2,669.10/x
  3. Step 3: Cross multiply
    3,928.75x = 5,418.95 × 2,669.10
  4. Step 4: Simplify right side
    3,928.75x = 14,463,719.45
  5. Step 5: Solve for x
    x = 14,463,719.45/3,928.75
  6. Step 6: Final answer
    x = 3,681.51

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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.