Home / 13,245.12-18,294.44-9,902.78

Finding the Fourth Proportional to 13,245.12, 18,294.44 and 9,902.78

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Solution

The fourth proportional to 13,245.12, 18,294.44 and 9,902.78 is: 13,677.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,245.12 : 18,294.44 = 9,902.78 : x
  2. Step 2: Convert to fraction form
    13,245.12/18,294.44 = 9,902.78/x
  3. Step 3: Cross multiply
    13,245.12x = 18,294.44 × 9,902.78
  4. Step 4: Simplify right side
    13,245.12x = 181,165,673.56
  5. Step 5: Solve for x
    x = 181,165,673.56/13,245.12
  6. Step 6: Final answer
    x = 13,677.92

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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.