Home / 13,221.11-18,218.76-9,433.60

Finding the Fourth Proportional to 13,221.11, 18,218.76 and 9,433.60

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Solution

The fourth proportional to 13,221.11, 18,218.76 and 9,433.60 is: 12,999.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.11 : 18,218.76 = 9,433.60 : x
  2. Step 2: Convert to fraction form
    13,221.11/18,218.76 = 9,433.60/x
  3. Step 3: Cross multiply
    13,221.11x = 18,218.76 × 9,433.60
  4. Step 4: Simplify right side
    13,221.11x = 171,868,494.34
  5. Step 5: Solve for x
    x = 171,868,494.34/13,221.11
  6. Step 6: Final answer
    x = 12,999.55

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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.