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Finding the Fourth Proportional to 5,220.59, 7,831.20 and 2,100.59

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Solution

The fourth proportional to 5,220.59, 7,831.20 and 2,100.59 is: 3,151.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,220.59 : 7,831.20 = 2,100.59 : x
  2. Step 2: Convert to fraction form
    5,220.59/7,831.20 = 2,100.59/x
  3. Step 3: Cross multiply
    5,220.59x = 7,831.20 × 2,100.59
  4. Step 4: Simplify right side
    5,220.59x = 16,450,101.25
  5. Step 5: Solve for x
    x = 16,450,101.25/5,220.59
  6. Step 6: Final answer
    x = 3,151.01

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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.