Home / 15,714.05-21,685.38-8,640.93

Finding the Fourth Proportional to 15,714.05, 21,685.38 and 8,640.93

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Solution

The fourth proportional to 15,714.05, 21,685.38 and 8,640.93 is: 11,924.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,714.05 : 21,685.38 = 8,640.93 : x
  2. Step 2: Convert to fraction form
    15,714.05/21,685.38 = 8,640.93/x
  3. Step 3: Cross multiply
    15,714.05x = 21,685.38 × 8,640.93
  4. Step 4: Simplify right side
    15,714.05x = 187,381,850.60
  5. Step 5: Solve for x
    x = 187,381,850.60/15,714.05
  6. Step 6: Final answer
    x = 11,924.48

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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.