Home / 13,635.40-20,435.28-13,291.96

Finding the Fourth Proportional to 13,635.40, 20,435.28 and 13,291.96

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Solution

The fourth proportional to 13,635.40, 20,435.28 and 13,291.96 is: 19,920.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,635.40 : 20,435.28 = 13,291.96 : x
  2. Step 2: Convert to fraction form
    13,635.40/20,435.28 = 13,291.96/x
  3. Step 3: Cross multiply
    13,635.40x = 20,435.28 × 13,291.96
  4. Step 4: Simplify right side
    13,635.40x = 271,624,924.35
  5. Step 5: Solve for x
    x = 271,624,924.35/13,635.40
  6. Step 6: Final answer
    x = 19,920.57

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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.