Home / 21,815.46-30,100.68-12,859.70

Finding the Fourth Proportional to 21,815.46, 30,100.68 and 12,859.70

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Solution

The fourth proportional to 21,815.46, 30,100.68 and 12,859.70 is: 17,743.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,815.46 : 30,100.68 = 12,859.70 : x
  2. Step 2: Convert to fraction form
    21,815.46/30,100.68 = 12,859.70/x
  3. Step 3: Cross multiply
    21,815.46x = 30,100.68 × 12,859.70
  4. Step 4: Simplify right side
    21,815.46x = 387,085,714.60
  5. Step 5: Solve for x
    x = 387,085,714.60/21,815.46
  6. Step 6: Final answer
    x = 17,743.64

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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.