Home / 21,239.86-31,824.33-14,989.54

Finding the Fourth Proportional to 21,239.86, 31,824.33 and 14,989.54

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Solution

The fourth proportional to 21,239.86, 31,824.33 and 14,989.54 is: 22,459.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.86 : 31,824.33 = 14,989.54 : x
  2. Step 2: Convert to fraction form
    21,239.86/31,824.33 = 14,989.54/x
  3. Step 3: Cross multiply
    21,239.86x = 31,824.33 × 14,989.54
  4. Step 4: Simplify right side
    21,239.86x = 477,032,067.51
  5. Step 5: Solve for x
    x = 477,032,067.51/21,239.86
  6. Step 6: Final answer
    x = 22,459.28

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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.