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Finding the Fourth Proportional to 28,374.83, 42,568.38 and 8,652.86

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Solution

The fourth proportional to 28,374.83, 42,568.38 and 8,652.86 is: 12,981.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,374.83 : 42,568.38 = 8,652.86 : x
  2. Step 2: Convert to fraction form
    28,374.83/42,568.38 = 8,652.86/x
  3. Step 3: Cross multiply
    28,374.83x = 42,568.38 × 8,652.86
  4. Step 4: Simplify right side
    28,374.83x = 368,338,019.72
  5. Step 5: Solve for x
    x = 368,338,019.72/28,374.83
  6. Step 6: Final answer
    x = 12,981.16

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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.