Home / 13,379.78-18,458.28-9,403.49

Finding the Fourth Proportional to 13,379.78, 18,458.28 and 9,403.49

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Solution

The fourth proportional to 13,379.78, 18,458.28 and 9,403.49 is: 12,972.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,379.78 : 18,458.28 = 9,403.49 : x
  2. Step 2: Convert to fraction form
    13,379.78/18,458.28 = 9,403.49/x
  3. Step 3: Cross multiply
    13,379.78x = 18,458.28 × 9,403.49
  4. Step 4: Simplify right side
    13,379.78x = 173,572,297.54
  5. Step 5: Solve for x
    x = 173,572,297.54/13,379.78
  6. Step 6: Final answer
    x = 12,972.73

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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.