Home / 21,327.25-31,925.25-13,915.75

Finding the Fourth Proportional to 21,327.25, 31,925.25 and 13,915.75

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Solution

The fourth proportional to 21,327.25, 31,925.25 and 13,915.75 is: 20,830.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,327.25 : 31,925.25 = 13,915.75 : x
  2. Step 2: Convert to fraction form
    21,327.25/31,925.25 = 13,915.75/x
  3. Step 3: Cross multiply
    21,327.25x = 31,925.25 × 13,915.75
  4. Step 4: Simplify right side
    21,327.25x = 444,263,797.69
  5. Step 5: Solve for x
    x = 444,263,797.69/21,327.25
  6. Step 6: Final answer
    x = 20,830.81

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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.