Home / 12,933.20-19,385.40-6,690.80

Finding the Fourth Proportional to 12,933.20, 19,385.40 and 6,690.80

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Solution

The fourth proportional to 12,933.20, 19,385.40 and 6,690.80 is: 10,028.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,933.20 : 19,385.40 = 6,690.80 : x
  2. Step 2: Convert to fraction form
    12,933.20/19,385.40 = 6,690.80/x
  3. Step 3: Cross multiply
    12,933.20x = 19,385.40 × 6,690.80
  4. Step 4: Simplify right side
    12,933.20x = 129,703,834.32
  5. Step 5: Solve for x
    x = 129,703,834.32/12,933.20
  6. Step 6: Final answer
    x = 10,028.75

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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.