Home / 13,559.42-18,719.16-8,786.18

Finding the Fourth Proportional to 13,559.42, 18,719.16 and 8,786.18

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Solution

The fourth proportional to 13,559.42, 18,719.16 and 8,786.18 is: 12,129.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,559.42 : 18,719.16 = 8,786.18 : x
  2. Step 2: Convert to fraction form
    13,559.42/18,719.16 = 8,786.18/x
  3. Step 3: Cross multiply
    13,559.42x = 18,719.16 × 8,786.18
  4. Step 4: Simplify right side
    13,559.42x = 164,469,909.21
  5. Step 5: Solve for x
    x = 164,469,909.21/13,559.42
  6. Step 6: Final answer
    x = 12,129.57

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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.