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Finding the Fourth Proportional to 15,673.54, 21,629.49 and 8,959.31

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Solution

The fourth proportional to 15,673.54, 21,629.49 and 8,959.31 is: 12,363.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,673.54 : 21,629.49 = 8,959.31 : x
  2. Step 2: Convert to fraction form
    15,673.54/21,629.49 = 8,959.31/x
  3. Step 3: Cross multiply
    15,673.54x = 21,629.49 × 8,959.31
  4. Step 4: Simplify right side
    15,673.54x = 193,785,342.97
  5. Step 5: Solve for x
    x = 193,785,342.97/15,673.54
  6. Step 6: Final answer
    x = 12,363.85

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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.