Home / 13,198.17-18,219.33-8,424.39

Finding the Fourth Proportional to 13,198.17, 18,219.33 and 8,424.39

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Solution

The fourth proportional to 13,198.17, 18,219.33 and 8,424.39 is: 11,629.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,198.17 : 18,219.33 = 8,424.39 : x
  2. Step 2: Convert to fraction form
    13,198.17/18,219.33 = 8,424.39/x
  3. Step 3: Cross multiply
    13,198.17x = 18,219.33 × 8,424.39
  4. Step 4: Simplify right side
    13,198.17x = 153,486,741.46
  5. Step 5: Solve for x
    x = 153,486,741.46/13,198.17
  6. Step 6: Final answer
    x = 11,629.40

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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.