Home / 21,819.71-30,111.13-12,746.85

Finding the Fourth Proportional to 21,819.71, 30,111.13 and 12,746.85

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Solution

The fourth proportional to 21,819.71, 30,111.13 and 12,746.85 is: 17,590.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,819.71 : 30,111.13 = 12,746.85 : x
  2. Step 2: Convert to fraction form
    21,819.71/30,111.13 = 12,746.85/x
  3. Step 3: Cross multiply
    21,819.71x = 30,111.13 × 12,746.85
  4. Step 4: Simplify right side
    21,819.71x = 383,822,057.44
  5. Step 5: Solve for x
    x = 383,822,057.44/21,819.71
  6. Step 6: Final answer
    x = 17,590.61

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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.