Home / 13,218.12-18,242.55-7,553.79

Finding the Fourth Proportional to 13,218.12, 18,242.55 and 7,553.79

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Solution

The fourth proportional to 13,218.12, 18,242.55 and 7,553.79 is: 10,425.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.12 : 18,242.55 = 7,553.79 : x
  2. Step 2: Convert to fraction form
    13,218.12/18,242.55 = 7,553.79/x
  3. Step 3: Cross multiply
    13,218.12x = 18,242.55 × 7,553.79
  4. Step 4: Simplify right side
    13,218.12x = 137,800,391.76
  5. Step 5: Solve for x
    x = 137,800,391.76/13,218.12
  6. Step 6: Final answer
    x = 10,425.11

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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.