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Finding the Fourth Proportional to 7,220.81, 10,831.22 and 2,603.81

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Solution

The fourth proportional to 7,220.81, 10,831.22 and 2,603.81 is: 3,905.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,220.81 : 10,831.22 = 2,603.81 : x
  2. Step 2: Convert to fraction form
    7,220.81/10,831.22 = 2,603.81/x
  3. Step 3: Cross multiply
    7,220.81x = 10,831.22 × 2,603.81
  4. Step 4: Simplify right side
    7,220.81x = 28,202,462.77
  5. Step 5: Solve for x
    x = 28,202,462.77/7,220.81
  6. Step 6: Final answer
    x = 3,905.72

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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.