Home / 13,445.39-18,549.65-8,138.27

Finding the Fourth Proportional to 13,445.39, 18,549.65 and 8,138.27

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Solution

The fourth proportional to 13,445.39, 18,549.65 and 8,138.27 is: 11,227.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,445.39 : 18,549.65 = 8,138.27 : x
  2. Step 2: Convert to fraction form
    13,445.39/18,549.65 = 8,138.27/x
  3. Step 3: Cross multiply
    13,445.39x = 18,549.65 × 8,138.27
  4. Step 4: Simplify right side
    13,445.39x = 150,961,926.67
  5. Step 5: Solve for x
    x = 150,961,926.67/13,445.39
  6. Step 6: Final answer
    x = 11,227.79

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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.