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Finding the Fourth Proportional to 18,159.86, 27,223.35 and 12,615.80

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Solution

The fourth proportional to 18,159.86, 27,223.35 and 12,615.80 is: 18,912.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,159.86 : 27,223.35 = 12,615.80 : x
  2. Step 2: Convert to fraction form
    18,159.86/27,223.35 = 12,615.80/x
  3. Step 3: Cross multiply
    18,159.86x = 27,223.35 × 12,615.80
  4. Step 4: Simplify right side
    18,159.86x = 343,444,338.93
  5. Step 5: Solve for x
    x = 343,444,338.93/18,159.86
  6. Step 6: Final answer
    x = 18,912.28

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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.