Home / 5,105.00-7,655.60-1,817.21

Finding the Fourth Proportional to 5,105.00, 7,655.60 and 1,817.21

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Solution

The fourth proportional to 5,105.00, 7,655.60 and 1,817.21 is: 2,725.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105.00 : 7,655.60 = 1,817.21 : x
  2. Step 2: Convert to fraction form
    5,105.00/7,655.60 = 1,817.21/x
  3. Step 3: Cross multiply
    5,105.00x = 7,655.60 × 1,817.21
  4. Step 4: Simplify right side
    5,105.00x = 13,911,799.14
  5. Step 5: Solve for x
    x = 13,911,799.14/5,105.00
  6. Step 6: Final answer
    x = 2,725.13

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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.