Home / 12,640.32-18,945.07-8,943.61

Finding the Fourth Proportional to 12,640.32, 18,945.07 and 8,943.61

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Solution

The fourth proportional to 12,640.32, 18,945.07 and 8,943.61 is: 13,404.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.32 : 18,945.07 = 8,943.61 : x
  2. Step 2: Convert to fraction form
    12,640.32/18,945.07 = 8,943.61/x
  3. Step 3: Cross multiply
    12,640.32x = 18,945.07 × 8,943.61
  4. Step 4: Simplify right side
    12,640.32x = 169,437,317.50
  5. Step 5: Solve for x
    x = 169,437,317.50/12,640.32
  6. Step 6: Final answer
    x = 13,404.51

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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.