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Finding the Fourth Proportional to 15,665.35, 21,616.18 and 8,951.41

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Solution

The fourth proportional to 15,665.35, 21,616.18 and 8,951.41 is: 12,351.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,665.35 : 21,616.18 = 8,951.41 : x
  2. Step 2: Convert to fraction form
    15,665.35/21,616.18 = 8,951.41/x
  3. Step 3: Cross multiply
    15,665.35x = 21,616.18 × 8,951.41
  4. Step 4: Simplify right side
    15,665.35x = 193,495,289.81
  5. Step 5: Solve for x
    x = 193,495,289.81/15,665.35
  6. Step 6: Final answer
    x = 12,351.80

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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.