Home / 21,830.20-32,831.70-19,583.80

Finding the Fourth Proportional to 21,830.20, 32,831.70 and 19,583.80

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Solution

The fourth proportional to 21,830.20, 32,831.70 and 19,583.80 is: 29,453.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,830.20 : 32,831.70 = 19,583.80 : x
  2. Step 2: Convert to fraction form
    21,830.20/32,831.70 = 19,583.80/x
  3. Step 3: Cross multiply
    21,830.20x = 32,831.70 × 19,583.80
  4. Step 4: Simplify right side
    21,830.20x = 642,969,446.46
  5. Step 5: Solve for x
    x = 642,969,446.46/21,830.20
  6. Step 6: Final answer
    x = 29,453.21

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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.