Home / 2,763.12-3,812.88-1,521.12

Finding the Fourth Proportional to 2,763.12, 3,812.88 and 1,521.12

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Solution

The fourth proportional to 2,763.12, 3,812.88 and 1,521.12 is: 2,099.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,763.12 : 3,812.88 = 1,521.12 : x
  2. Step 2: Convert to fraction form
    2,763.12/3,812.88 = 1,521.12/x
  3. Step 3: Cross multiply
    2,763.12x = 3,812.88 × 1,521.12
  4. Step 4: Simplify right side
    2,763.12x = 5,799,848.03
  5. Step 5: Solve for x
    x = 5,799,848.03/2,763.12
  6. Step 6: Final answer
    x = 2,099.02

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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.