Home / 2,815.28-3,885.08-1,539.16

Finding the Fourth Proportional to 2,815.28, 3,885.08 and 1,539.16

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Solution

The fourth proportional to 2,815.28, 3,885.08 and 1,539.16 is: 2,124.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.28 : 3,885.08 = 1,539.16 : x
  2. Step 2: Convert to fraction form
    2,815.28/3,885.08 = 1,539.16/x
  3. Step 3: Cross multiply
    2,815.28x = 3,885.08 × 1,539.16
  4. Step 4: Simplify right side
    2,815.28x = 5,979,768.44
  5. Step 5: Solve for x
    x = 5,979,768.44/2,815.28
  6. Step 6: Final answer
    x = 2,124.04

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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.