Home / 20,257.75-30,400.13-7,788.07

Finding the Fourth Proportional to 20,257.75, 30,400.13 and 7,788.07

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Solution

The fourth proportional to 20,257.75, 30,400.13 and 7,788.07 is: 11,687.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,257.75 : 30,400.13 = 7,788.07 : x
  2. Step 2: Convert to fraction form
    20,257.75/30,400.13 = 7,788.07/x
  3. Step 3: Cross multiply
    20,257.75x = 30,400.13 × 7,788.07
  4. Step 4: Simplify right side
    20,257.75x = 236,758,340.45
  5. Step 5: Solve for x
    x = 236,758,340.45/20,257.75
  6. Step 6: Final answer
    x = 11,687.30

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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.