Home / 13,764.75-18,998.90-8,390.84

Finding the Fourth Proportional to 13,764.75, 18,998.90 and 8,390.84

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Solution

The fourth proportional to 13,764.75, 18,998.90 and 8,390.84 is: 11,581.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,764.75 : 18,998.90 = 8,390.84 : x
  2. Step 2: Convert to fraction form
    13,764.75/18,998.90 = 8,390.84/x
  3. Step 3: Cross multiply
    13,764.75x = 18,998.90 × 8,390.84
  4. Step 4: Simplify right side
    13,764.75x = 159,416,593.13
  5. Step 5: Solve for x
    x = 159,416,593.13/13,764.75
  6. Step 6: Final answer
    x = 11,581.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.