Home / 15,717.66-21,690.36-8,644.61

Finding the Fourth Proportional to 15,717.66, 21,690.36 and 8,644.61

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Solution

The fourth proportional to 15,717.66, 21,690.36 and 8,644.61 is: 11,929.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.66 : 21,690.36 = 8,644.61 : x
  2. Step 2: Convert to fraction form
    15,717.66/21,690.36 = 8,644.61/x
  3. Step 3: Cross multiply
    15,717.66x = 21,690.36 × 8,644.61
  4. Step 4: Simplify right side
    15,717.66x = 187,504,594.51
  5. Step 5: Solve for x
    x = 187,504,594.51/15,717.66
  6. Step 6: Final answer
    x = 11,929.55

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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.