Home / 13,823.20-20,725.08-6,419.80

Finding the Fourth Proportional to 13,823.20, 20,725.08 and 6,419.80

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Solution

The fourth proportional to 13,823.20, 20,725.08 and 6,419.80 is: 9,625.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,823.20 : 20,725.08 = 6,419.80 : x
  2. Step 2: Convert to fraction form
    13,823.20/20,725.08 = 6,419.80/x
  3. Step 3: Cross multiply
    13,823.20x = 20,725.08 × 6,419.80
  4. Step 4: Simplify right side
    13,823.20x = 133,050,868.58
  5. Step 5: Solve for x
    x = 133,050,868.58/13,823.20
  6. Step 6: Final answer
    x = 9,625.19

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1.5x scale

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.