Home / 13,933.22-20,905.14-8,390.50

Finding the Fourth Proportional to 13,933.22, 20,905.14 and 8,390.50

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Solution

The fourth proportional to 13,933.22, 20,905.14 and 8,390.50 is: 12,588.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,933.22 : 20,905.14 = 8,390.50 : x
  2. Step 2: Convert to fraction form
    13,933.22/20,905.14 = 8,390.50/x
  3. Step 3: Cross multiply
    13,933.22x = 20,905.14 × 8,390.50
  4. Step 4: Simplify right side
    13,933.22x = 175,404,577.17
  5. Step 5: Solve for x
    x = 175,404,577.17/13,933.22
  6. Step 6: Final answer
    x = 12,588.95

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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.