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Finding the Fourth Proportional to 28,652.06, 42,978.09 and 8,932.20

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Solution

The fourth proportional to 28,652.06, 42,978.09 and 8,932.20 is: 13,398.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,652.06 : 42,978.09 = 8,932.20 : x
  2. Step 2: Convert to fraction form
    28,652.06/42,978.09 = 8,932.20/x
  3. Step 3: Cross multiply
    28,652.06x = 42,978.09 × 8,932.20
  4. Step 4: Simplify right side
    28,652.06x = 383,888,895.50
  5. Step 5: Solve for x
    x = 383,888,895.50/28,652.06
  6. Step 6: Final answer
    x = 13,398.30

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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.