Home / 13,178.88-18,186.12-7,210.08

Finding the Fourth Proportional to 13,178.88, 18,186.12 and 7,210.08

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Solution

The fourth proportional to 13,178.88, 18,186.12 and 7,210.08 is: 9,949.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,178.88 : 18,186.12 = 7,210.08 : x
  2. Step 2: Convert to fraction form
    13,178.88/18,186.12 = 7,210.08/x
  3. Step 3: Cross multiply
    13,178.88x = 18,186.12 × 7,210.08
  4. Step 4: Simplify right side
    13,178.88x = 131,123,380.09
  5. Step 5: Solve for x
    x = 131,123,380.09/13,178.88
  6. Step 6: Final answer
    x = 9,949.51

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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.