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Finding the Fourth Proportional to 28,652.29, 42,978.73 and 8,661.95

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Solution

The fourth proportional to 28,652.29, 42,978.73 and 8,661.95 is: 12,993.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,652.29 : 42,978.73 = 8,661.95 : x
  2. Step 2: Convert to fraction form
    28,652.29/42,978.73 = 8,661.95/x
  3. Step 3: Cross multiply
    28,652.29x = 42,978.73 × 8,661.95
  4. Step 4: Simplify right side
    28,652.29x = 372,279,610.32
  5. Step 5: Solve for x
    x = 372,279,610.32/28,652.29
  6. Step 6: Final answer
    x = 12,993.01

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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.