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Finding the Fourth Proportional to 15,847.29, 21,869.64 and 8,773.65

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Solution

The fourth proportional to 15,847.29, 21,869.64 and 8,773.65 is: 12,107.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,847.29 : 21,869.64 = 8,773.65 : x
  2. Step 2: Convert to fraction form
    15,847.29/21,869.64 = 8,773.65/x
  3. Step 3: Cross multiply
    15,847.29x = 21,869.64 × 8,773.65
  4. Step 4: Simplify right side
    15,847.29x = 191,876,566.99
  5. Step 5: Solve for x
    x = 191,876,566.99/15,847.29
  6. Step 6: Final answer
    x = 12,107.85

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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.