Home / 20,819.14-28,730.64-11,387.50

Finding the Fourth Proportional to 20,819.14, 28,730.64 and 11,387.50

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Solution

The fourth proportional to 20,819.14, 28,730.64 and 11,387.50 is: 15,714.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.14 : 28,730.64 = 11,387.50 : x
  2. Step 2: Convert to fraction form
    20,819.14/28,730.64 = 11,387.50/x
  3. Step 3: Cross multiply
    20,819.14x = 28,730.64 × 11,387.50
  4. Step 4: Simplify right side
    20,819.14x = 327,170,163
  5. Step 5: Solve for x
    x = 327,170,163/20,819.14
  6. Step 6: Final answer
    x = 15,714.87

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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.