Home / 10,380.80-15,571.20-3,455.30

Finding the Fourth Proportional to 10,380.80, 15,571.20 and 3,455.30

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Solution

The fourth proportional to 10,380.80, 15,571.20 and 3,455.30 is: 5,182.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,380.80 : 15,571.20 = 3,455.30 : x
  2. Step 2: Convert to fraction form
    10,380.80/15,571.20 = 3,455.30/x
  3. Step 3: Cross multiply
    10,380.80x = 15,571.20 × 3,455.30
  4. Step 4: Simplify right side
    10,380.80x = 53,803,167.36
  5. Step 5: Solve for x
    x = 53,803,167.36/10,380.80
  6. Step 6: Final answer
    x = 5,182.95

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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.