Home / 3,928.30-5,428.01-2,807.26

Finding the Fourth Proportional to 3,928.30, 5,428.01 and 2,807.26

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Solution

The fourth proportional to 3,928.30, 5,428.01 and 2,807.26 is: 3,878.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.30 : 5,428.01 = 2,807.26 : x
  2. Step 2: Convert to fraction form
    3,928.30/5,428.01 = 2,807.26/x
  3. Step 3: Cross multiply
    3,928.30x = 5,428.01 × 2,807.26
  4. Step 4: Simplify right side
    3,928.30x = 15,237,828.80
  5. Step 5: Solve for x
    x = 15,237,828.80/3,928.30
  6. Step 6: Final answer
    x = 3,878.99

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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.