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Finding the Fourth Proportional to 18,364.32, 27,542.16 and 9,128.16

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Solution

The fourth proportional to 18,364.32, 27,542.16 and 9,128.16 is: 13,690.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,364.32 : 27,542.16 = 9,128.16 : x
  2. Step 2: Convert to fraction form
    18,364.32/27,542.16 = 9,128.16/x
  3. Step 3: Cross multiply
    18,364.32x = 27,542.16 × 9,128.16
  4. Step 4: Simplify right side
    18,364.32x = 251,409,243.23
  5. Step 5: Solve for x
    x = 251,409,243.23/18,364.32
  6. Step 6: Final answer
    x = 13,690.09

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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.