Home / 13,118.26-18,109.89-8,891.66

Finding the Fourth Proportional to 13,118.26, 18,109.89 and 8,891.66

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Solution

The fourth proportional to 13,118.26, 18,109.89 and 8,891.66 is: 12,275.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.26 : 18,109.89 = 8,891.66 : x
  2. Step 2: Convert to fraction form
    13,118.26/18,109.89 = 8,891.66/x
  3. Step 3: Cross multiply
    13,118.26x = 18,109.89 × 8,891.66
  4. Step 4: Simplify right side
    13,118.26x = 161,026,984.52
  5. Step 5: Solve for x
    x = 161,026,984.52/13,118.26
  6. Step 6: Final answer
    x = 12,275.03

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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.