Home / 13,811.80-20,725.28-6,419.76

Finding the Fourth Proportional to 13,811.80, 20,725.28 and 6,419.76

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Solution

The fourth proportional to 13,811.80, 20,725.28 and 6,419.76 is: 9,633.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,811.80 : 20,725.28 = 6,419.76 : x
  2. Step 2: Convert to fraction form
    13,811.80/20,725.28 = 6,419.76/x
  3. Step 3: Cross multiply
    13,811.80x = 20,725.28 × 6,419.76
  4. Step 4: Simplify right side
    13,811.80x = 133,051,323.53
  5. Step 5: Solve for x
    x = 133,051,323.53/13,811.80
  6. Step 6: Final answer
    x = 9,633.16

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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.