Home / 12,984.20-19,438.50-9,711.80

Finding the Fourth Proportional to 12,984.20, 19,438.50 and 9,711.80

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Solution

The fourth proportional to 12,984.20, 19,438.50 and 9,711.80 is: 14,539.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,984.20 : 19,438.50 = 9,711.80 : x
  2. Step 2: Convert to fraction form
    12,984.20/19,438.50 = 9,711.80/x
  3. Step 3: Cross multiply
    12,984.20x = 19,438.50 × 9,711.80
  4. Step 4: Simplify right side
    12,984.20x = 188,782,824.30
  5. Step 5: Solve for x
    x = 188,782,824.30/12,984.20
  6. Step 6: Final answer
    x = 14,539.43

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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.