Home / 13,650.80-20,439.74-7,799.36

Finding the Fourth Proportional to 13,650.80, 20,439.74 and 7,799.36

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Solution

The fourth proportional to 13,650.80, 20,439.74 and 7,799.36 is: 11,678.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,650.80 : 20,439.74 = 7,799.36 : x
  2. Step 2: Convert to fraction form
    13,650.80/20,439.74 = 7,799.36/x
  3. Step 3: Cross multiply
    13,650.80x = 20,439.74 × 7,799.36
  4. Step 4: Simplify right side
    13,650.80x = 159,416,890.57
  5. Step 5: Solve for x
    x = 159,416,890.57/13,650.80
  6. Step 6: Final answer
    x = 11,678.21

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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.