Home / 13,221.01-19,831.38-3,987.01

Finding the Fourth Proportional to 13,221.01, 19,831.38 and 3,987.01

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Solution

The fourth proportional to 13,221.01, 19,831.38 and 3,987.01 is: 5,980.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.01 : 19,831.38 = 3,987.01 : x
  2. Step 2: Convert to fraction form
    13,221.01/19,831.38 = 3,987.01/x
  3. Step 3: Cross multiply
    13,221.01x = 19,831.38 × 3,987.01
  4. Step 4: Simplify right side
    13,221.01x = 79,067,910.37
  5. Step 5: Solve for x
    x = 79,067,910.37/13,221.01
  6. Step 6: Final answer
    x = 5,980.47

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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.