Home / 20,819.58-28,730.70-12,750.54

Finding the Fourth Proportional to 20,819.58, 28,730.70 and 12,750.54

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Solution

The fourth proportional to 20,819.58, 28,730.70 and 12,750.54 is: 17,595.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.58 : 28,730.70 = 12,750.54 : x
  2. Step 2: Convert to fraction form
    20,819.58/28,730.70 = 12,750.54/x
  3. Step 3: Cross multiply
    20,819.58x = 28,730.70 × 12,750.54
  4. Step 4: Simplify right side
    20,819.58x = 366,331,939.58
  5. Step 5: Solve for x
    x = 366,331,939.58/20,819.58
  6. Step 6: Final answer
    x = 17,595.55

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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.