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Finding the Fourth Proportional to 18,672.48, 27,990.52 and 11,990.16

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Solution

The fourth proportional to 18,672.48, 27,990.52 and 11,990.16 is: 17,973.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.48 : 27,990.52 = 11,990.16 : x
  2. Step 2: Convert to fraction form
    18,672.48/27,990.52 = 11,990.16/x
  3. Step 3: Cross multiply
    18,672.48x = 27,990.52 × 11,990.16
  4. Step 4: Simplify right side
    18,672.48x = 335,610,813.28
  5. Step 5: Solve for x
    x = 335,610,813.28/18,672.48
  6. Step 6: Final answer
    x = 17,973.55

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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.