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Finding the Fourth Proportional to 18,672.90, 27,998.55 and 6,987.30

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Solution

The fourth proportional to 18,672.90, 27,998.55 and 6,987.30 is: 10,476.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.90 : 27,998.55 = 6,987.30 : x
  2. Step 2: Convert to fraction form
    18,672.90/27,998.55 = 6,987.30/x
  3. Step 3: Cross multiply
    18,672.90x = 27,998.55 × 6,987.30
  4. Step 4: Simplify right side
    18,672.90x = 195,634,268.42
  5. Step 5: Solve for x
    x = 195,634,268.42/18,672.90
  6. Step 6: Final answer
    x = 10,476.91

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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.