Home / 8,911.75-12,301.46-5,185.75

Finding the Fourth Proportional to 8,911.75, 12,301.46 and 5,185.75

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Solution

The fourth proportional to 8,911.75, 12,301.46 and 5,185.75 is: 7,158.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,911.75 : 12,301.46 = 5,185.75 : x
  2. Step 2: Convert to fraction form
    8,911.75/12,301.46 = 5,185.75/x
  3. Step 3: Cross multiply
    8,911.75x = 12,301.46 × 5,185.75
  4. Step 4: Simplify right side
    8,911.75x = 63,792,296.20
  5. Step 5: Solve for x
    x = 63,792,296.20/8,911.75
  6. Step 6: Final answer
    x = 7,158.22

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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.