Home / 13,118.13-18,109.71-8,891.53

Finding the Fourth Proportional to 13,118.13, 18,109.71 and 8,891.53

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Solution

The fourth proportional to 13,118.13, 18,109.71 and 8,891.53 is: 12,274.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.13 : 18,109.71 = 8,891.53 : x
  2. Step 2: Convert to fraction form
    13,118.13/18,109.71 = 8,891.53/x
  3. Step 3: Cross multiply
    13,118.13x = 18,109.71 × 8,891.53
  4. Step 4: Simplify right side
    13,118.13x = 161,022,984.48
  5. Step 5: Solve for x
    x = 161,022,984.48/13,118.13
  6. Step 6: Final answer
    x = 12,274.84

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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.