Home / 5,137.80-7,706.68-1,242.20

Finding the Fourth Proportional to 5,137.80, 7,706.68 and 1,242.20

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Solution

The fourth proportional to 5,137.80, 7,706.68 and 1,242.20 is: 1,863.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,137.80 : 7,706.68 = 1,242.20 : x
  2. Step 2: Convert to fraction form
    5,137.80/7,706.68 = 1,242.20/x
  3. Step 3: Cross multiply
    5,137.80x = 7,706.68 × 1,242.20
  4. Step 4: Simplify right side
    5,137.80x = 9,573,237.90
  5. Step 5: Solve for x
    x = 9,573,237.90/5,137.80
  6. Step 6: Final answer
    x = 1,863.30

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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.