Home / 13,680.21-18,869.34-8,377.65

Finding the Fourth Proportional to 13,680.21, 18,869.34 and 8,377.65

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Solution

The fourth proportional to 13,680.21, 18,869.34 and 8,377.65 is: 11,555.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.21 : 18,869.34 = 8,377.65 : x
  2. Step 2: Convert to fraction form
    13,680.21/18,869.34 = 8,377.65/x
  3. Step 3: Cross multiply
    13,680.21x = 18,869.34 × 8,377.65
  4. Step 4: Simplify right side
    13,680.21x = 158,080,726.25
  5. Step 5: Solve for x
    x = 158,080,726.25/13,680.21
  6. Step 6: Final answer
    x = 11,555.43

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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.