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Finding the Fourth Proportional to 15,866.61, 21,895.86 and 8,793.03

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Solution

The fourth proportional to 15,866.61, 21,895.86 and 8,793.03 is: 12,134.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,866.61 : 21,895.86 = 8,793.03 : x
  2. Step 2: Convert to fraction form
    15,866.61/21,895.86 = 8,793.03/x
  3. Step 3: Cross multiply
    15,866.61x = 21,895.86 × 8,793.03
  4. Step 4: Simplify right side
    15,866.61x = 192,530,953.86
  5. Step 5: Solve for x
    x = 192,530,953.86/15,866.61
  6. Step 6: Final answer
    x = 12,134.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.