Home / 6,121.40-9,215.42-5,577.08

Finding the Fourth Proportional to 6,121.40, 9,215.42 and 5,577.08

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Solution

The fourth proportional to 6,121.40, 9,215.42 and 5,577.08 is: 8,395.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,121.40 : 9,215.42 = 5,577.08 : x
  2. Step 2: Convert to fraction form
    6,121.40/9,215.42 = 5,577.08/x
  3. Step 3: Cross multiply
    6,121.40x = 9,215.42 × 5,577.08
  4. Step 4: Simplify right side
    6,121.40x = 51,395,134.57
  5. Step 5: Solve for x
    x = 51,395,134.57/6,121.40
  6. Step 6: Final answer
    x = 8,395.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.