Home / 2,815.16-3,886.18-1,872.62

Finding the Fourth Proportional to 2,815.16, 3,886.18 and 1,872.62

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Solution

The fourth proportional to 2,815.16, 3,886.18 and 1,872.62 is: 2,585.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.16 : 3,886.18 = 1,872.62 : x
  2. Step 2: Convert to fraction form
    2,815.16/3,886.18 = 1,872.62/x
  3. Step 3: Cross multiply
    2,815.16x = 3,886.18 × 1,872.62
  4. Step 4: Simplify right side
    2,815.16x = 7,277,328.85
  5. Step 5: Solve for x
    x = 7,277,328.85/2,815.16
  6. Step 6: Final answer
    x = 2,585.05

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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.