Home / 20,155.30-27,806.56-12,984.68

Finding the Fourth Proportional to 20,155.30, 27,806.56 and 12,984.68

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Solution

The fourth proportional to 20,155.30, 27,806.56 and 12,984.68 is: 17,913.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.30 : 27,806.56 = 12,984.68 : x
  2. Step 2: Convert to fraction form
    20,155.30/27,806.56 = 12,984.68/x
  3. Step 3: Cross multiply
    20,155.30x = 27,806.56 × 12,984.68
  4. Step 4: Simplify right side
    20,155.30x = 361,059,144.47
  5. Step 5: Solve for x
    x = 361,059,144.47/20,155.30
  6. Step 6: Final answer
    x = 17,913.86

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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.