Home / 15,714.26-21,685.80-8,640.80

Finding the Fourth Proportional to 15,714.26, 21,685.80 and 8,640.80

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Solution

The fourth proportional to 15,714.26, 21,685.80 and 8,640.80 is: 11,924.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,714.26 : 21,685.80 = 8,640.80 : x
  2. Step 2: Convert to fraction form
    15,714.26/21,685.80 = 8,640.80/x
  3. Step 3: Cross multiply
    15,714.26x = 21,685.80 × 8,640.80
  4. Step 4: Simplify right side
    15,714.26x = 187,382,660.64
  5. Step 5: Solve for x
    x = 187,382,660.64/15,714.26
  6. Step 6: Final answer
    x = 11,924.37

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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.