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Finding the Fourth Proportional to 15,724.97, 21,698.67 and 8,650.97

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Solution

The fourth proportional to 15,724.97, 21,698.67 and 8,650.97 is: 11,937.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,724.97 : 21,698.67 = 8,650.97 : x
  2. Step 2: Convert to fraction form
    15,724.97/21,698.67 = 8,650.97/x
  3. Step 3: Cross multiply
    15,724.97x = 21,698.67 × 8,650.97
  4. Step 4: Simplify right side
    15,724.97x = 187,714,391.46
  5. Step 5: Solve for x
    x = 187,714,391.46/15,724.97
  6. Step 6: Final answer
    x = 11,937.35

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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.