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Finding the Fourth Proportional to 15,662.43, 21,612.96 and 8,947.80

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Solution

The fourth proportional to 15,662.43, 21,612.96 and 8,947.80 is: 12,347.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,662.43 : 21,612.96 = 8,947.80 : x
  2. Step 2: Convert to fraction form
    15,662.43/21,612.96 = 8,947.80/x
  3. Step 3: Cross multiply
    15,662.43x = 21,612.96 × 8,947.80
  4. Step 4: Simplify right side
    15,662.43x = 193,388,443.49
  5. Step 5: Solve for x
    x = 193,388,443.49/15,662.43
  6. Step 6: Final answer
    x = 12,347.28

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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.