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Finding the Fourth Proportional to 15,866.78, 21,895.83 and 8,793.14

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Solution

The fourth proportional to 15,866.78, 21,895.83 and 8,793.14 is: 12,134.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,866.78 : 21,895.83 = 8,793.14 : x
  2. Step 2: Convert to fraction form
    15,866.78/21,895.83 = 8,793.14/x
  3. Step 3: Cross multiply
    15,866.78x = 21,895.83 × 8,793.14
  4. Step 4: Simplify right side
    15,866.78x = 192,533,098.61
  5. Step 5: Solve for x
    x = 192,533,098.61/15,866.78
  6. Step 6: Final answer
    x = 12,134.35

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1.5x scale

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.