Home / 13,178.68-18,185.34-8,921.08

Finding the Fourth Proportional to 13,178.68, 18,185.34 and 8,921.08

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Solution

The fourth proportional to 13,178.68, 18,185.34 and 8,921.08 is: 12,310.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,178.68 : 18,185.34 = 8,921.08 : x
  2. Step 2: Convert to fraction form
    13,178.68/18,185.34 = 8,921.08/x
  3. Step 3: Cross multiply
    13,178.68x = 18,185.34 × 8,921.08
  4. Step 4: Simplify right side
    13,178.68x = 162,232,872.97
  5. Step 5: Solve for x
    x = 162,232,872.97/13,178.68
  6. Step 6: Final answer
    x = 12,310.25

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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.