Home / 13,390.99-18,456.50-8,906.73

Finding the Fourth Proportional to 13,390.99, 18,456.50 and 8,906.73

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Solution

The fourth proportional to 13,390.99, 18,456.50 and 8,906.73 is: 12,275.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.99 : 18,456.50 = 8,906.73 : x
  2. Step 2: Convert to fraction form
    13,390.99/18,456.50 = 8,906.73/x
  3. Step 3: Cross multiply
    13,390.99x = 18,456.50 × 8,906.73
  4. Step 4: Simplify right side
    13,390.99x = 164,387,015.30
  5. Step 5: Solve for x
    x = 164,387,015.30/13,390.99
  6. Step 6: Final answer
    x = 12,275.94

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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.