Home / 12,209.28-16,860-11,554.56

Finding the Fourth Proportional to 12,209.28, 16,860 and 11,554.56

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Solution

The fourth proportional to 12,209.28, 16,860 and 11,554.56 is: 15,955.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,209.28 : 16,860 = 11,554.56 : x
  2. Step 2: Convert to fraction form
    12,209.28/16,860 = 11,554.56/x
  3. Step 3: Cross multiply
    12,209.28x = 16,860 × 11,554.56
  4. Step 4: Simplify right side
    12,209.28x = 194,809,881.60
  5. Step 5: Solve for x
    x = 194,809,881.60/12,209.28
  6. Step 6: Final answer
    x = 15,955.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.