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Finding the Fourth Proportional to 28,611.78, 42,926.62 and 12,830.04

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Solution

The fourth proportional to 28,611.78, 42,926.62 and 12,830.04 is: 19,249.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,611.78 : 42,926.62 = 12,830.04 : x
  2. Step 2: Convert to fraction form
    28,611.78/42,926.62 = 12,830.04/x
  3. Step 3: Cross multiply
    28,611.78x = 42,926.62 × 12,830.04
  4. Step 4: Simplify right side
    28,611.78x = 550,750,251.66
  5. Step 5: Solve for x
    x = 550,750,251.66/28,611.78
  6. Step 6: Final answer
    x = 19,249.07

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