Home / 3,618.12-5,428.80-1,864.20

Finding the Fourth Proportional to 3,618.12, 5,428.80 and 1,864.20

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Solution

The fourth proportional to 3,618.12, 5,428.80 and 1,864.20 is: 2,797.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.12 : 5,428.80 = 1,864.20 : x
  2. Step 2: Convert to fraction form
    3,618.12/5,428.80 = 1,864.20/x
  3. Step 3: Cross multiply
    3,618.12x = 5,428.80 × 1,864.20
  4. Step 4: Simplify right side
    3,618.12x = 10,120,368.96
  5. Step 5: Solve for x
    x = 10,120,368.96/3,618.12
  6. Step 6: Final answer
    x = 2,797.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.