Home / 21,214.20-31,778.10-10,831.80

Finding the Fourth Proportional to 21,214.20, 31,778.10 and 10,831.80

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Solution

The fourth proportional to 21,214.20, 31,778.10 and 10,831.80 is: 16,225.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,214.20 : 31,778.10 = 10,831.80 : x
  2. Step 2: Convert to fraction form
    21,214.20/31,778.10 = 10,831.80/x
  3. Step 3: Cross multiply
    21,214.20x = 31,778.10 × 10,831.80
  4. Step 4: Simplify right side
    21,214.20x = 344,214,023.58
  5. Step 5: Solve for x
    x = 344,214,023.58/21,214.20
  6. Step 6: Final answer
    x = 16,225.64

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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.