Home / 20,460.68-28,239.11-12,911.14

Finding the Fourth Proportional to 20,460.68, 28,239.11 and 12,911.14

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Solution

The fourth proportional to 20,460.68, 28,239.11 and 12,911.14 is: 17,819.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,460.68 : 28,239.11 = 12,911.14 : x
  2. Step 2: Convert to fraction form
    20,460.68/28,239.11 = 12,911.14/x
  3. Step 3: Cross multiply
    20,460.68x = 28,239.11 × 12,911.14
  4. Step 4: Simplify right side
    20,460.68x = 364,598,896.93
  5. Step 5: Solve for x
    x = 364,598,896.93/20,460.68
  6. Step 6: Final answer
    x = 17,819.50

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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.