Home / 13,456.40-18,578.97-8,422.65

Finding the Fourth Proportional to 13,456.40, 18,578.97 and 8,422.65

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Solution

The fourth proportional to 13,456.40, 18,578.97 and 8,422.65 is: 11,628.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,456.40 : 18,578.97 = 8,422.65 : x
  2. Step 2: Convert to fraction form
    13,456.40/18,578.97 = 8,422.65/x
  3. Step 3: Cross multiply
    13,456.40x = 18,578.97 × 8,422.65
  4. Step 4: Simplify right side
    13,456.40x = 156,484,161.67
  5. Step 5: Solve for x
    x = 156,484,161.67/13,456.40
  6. Step 6: Final answer
    x = 11,628.98

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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.