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Finding the Fourth Proportional to 15,916.78, 21,965.10 and 8,843.86

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Solution

The fourth proportional to 15,916.78, 21,965.10 and 8,843.86 is: 12,204.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,916.78 : 21,965.10 = 8,843.86 : x
  2. Step 2: Convert to fraction form
    15,916.78/21,965.10 = 8,843.86/x
  3. Step 3: Cross multiply
    15,916.78x = 21,965.10 × 8,843.86
  4. Step 4: Simplify right side
    15,916.78x = 194,256,269.29
  5. Step 5: Solve for x
    x = 194,256,269.29/15,916.78
  6. Step 6: Final answer
    x = 12,204.50

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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.