Home / 5,220-7,831.68-3,269.76

Finding the Fourth Proportional to 5,220, 7,831.68 and 3,269.76

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Solution

The fourth proportional to 5,220, 7,831.68 and 3,269.76 is: 4,905.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,220 : 7,831.68 = 3,269.76 : x
  2. Step 2: Convert to fraction form
    5,220/7,831.68 = 3,269.76/x
  3. Step 3: Cross multiply
    5,220x = 7,831.68 × 3,269.76
  4. Step 4: Simplify right side
    5,220x = 25,607,714.00
  5. Step 5: Solve for x
    x = 25,607,714.00/5,220
  6. Step 6: Final answer
    x = 4,905.69

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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.