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Finding the Fourth Proportional to 28,374.60, 42,568.80 and 8,653.56

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Solution

The fourth proportional to 28,374.60, 42,568.80 and 8,653.56 is: 12,982.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,374.60 : 42,568.80 = 8,653.56 : x
  2. Step 2: Convert to fraction form
    28,374.60/42,568.80 = 8,653.56/x
  3. Step 3: Cross multiply
    28,374.60x = 42,568.80 × 8,653.56
  4. Step 4: Simplify right side
    28,374.60x = 368,371,664.93
  5. Step 5: Solve for x
    x = 368,371,664.93/28,374.60
  6. Step 6: Final answer
    x = 12,982.44

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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.