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Finding the Fourth Proportional to 18,117.26, 27,155.94 and 13,660.63

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Solution

The fourth proportional to 18,117.26, 27,155.94 and 13,660.63 is: 20,475.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,117.26 : 27,155.94 = 13,660.63 : x
  2. Step 2: Convert to fraction form
    18,117.26/27,155.94 = 13,660.63/x
  3. Step 3: Cross multiply
    18,117.26x = 27,155.94 × 13,660.63
  4. Step 4: Simplify right side
    18,117.26x = 370,967,248.64
  5. Step 5: Solve for x
    x = 370,967,248.64/18,117.26
  6. Step 6: Final answer
    x = 20,475.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.