Home / 19,831.20-29,698.20-13,221.60

Finding the Fourth Proportional to 19,831.20, 29,698.20 and 13,221.60

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Solution

The fourth proportional to 19,831.20, 29,698.20 and 13,221.60 is: 19,800.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,831.20 : 29,698.20 = 13,221.60 : x
  2. Step 2: Convert to fraction form
    19,831.20/29,698.20 = 13,221.60/x
  3. Step 3: Cross multiply
    19,831.20x = 29,698.20 × 13,221.60
  4. Step 4: Simplify right side
    19,831.20x = 392,657,721.12
  5. Step 5: Solve for x
    x = 392,657,721.12/19,831.20
  6. Step 6: Final answer
    x = 19,800.00

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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.