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Finding the Fourth Proportional to 7,220.87, 10,831.68 and 2,290.89

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Solution

The fourth proportional to 7,220.87, 10,831.68 and 2,290.89 is: 3,436.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,220.87 : 10,831.68 = 2,290.89 : x
  2. Step 2: Convert to fraction form
    7,220.87/10,831.68 = 2,290.89/x
  3. Step 3: Cross multiply
    7,220.87x = 10,831.68 × 2,290.89
  4. Step 4: Simplify right side
    7,220.87x = 24,814,187.40
  5. Step 5: Solve for x
    x = 24,814,187.40/7,220.87
  6. Step 6: Final answer
    x = 3,436.46

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1.5x scale

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.