Home / 13,385.00-18,471.78-8,078.78

Finding the Fourth Proportional to 13,385.00, 18,471.78 and 8,078.78

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Solution

The fourth proportional to 13,385.00, 18,471.78 and 8,078.78 is: 11,149.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.00 : 18,471.78 = 8,078.78 : x
  2. Step 2: Convert to fraction form
    13,385.00/18,471.78 = 8,078.78/x
  3. Step 3: Cross multiply
    13,385.00x = 18,471.78 × 8,078.78
  4. Step 4: Simplify right side
    13,385.00x = 149,229,493.01
  5. Step 5: Solve for x
    x = 149,229,493.01/13,385.00
  6. Step 6: Final answer
    x = 11,149.01

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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.