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Finding the Fourth Proportional to 21,879.83, 32,826.95 and 8,724.95

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Solution

The fourth proportional to 21,879.83, 32,826.95 and 8,724.95 is: 13,090.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,879.83 : 32,826.95 = 8,724.95 : x
  2. Step 2: Convert to fraction form
    21,879.83/32,826.95 = 8,724.95/x
  3. Step 3: Cross multiply
    21,879.83x = 32,826.95 × 8,724.95
  4. Step 4: Simplify right side
    21,879.83x = 286,413,497.40
  5. Step 5: Solve for x
    x = 286,413,497.40/21,879.83
  6. Step 6: Final answer
    x = 13,090.30

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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.