Home / 20,155.05-27,806.21-12,984.42

Finding the Fourth Proportional to 20,155.05, 27,806.21 and 12,984.42

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Solution

The fourth proportional to 20,155.05, 27,806.21 and 12,984.42 is: 17,913.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.05 : 27,806.21 = 12,984.42 : x
  2. Step 2: Convert to fraction form
    20,155.05/27,806.21 = 12,984.42/x
  3. Step 3: Cross multiply
    20,155.05x = 27,806.21 × 12,984.42
  4. Step 4: Simplify right side
    20,155.05x = 361,047,670.33
  5. Step 5: Solve for x
    x = 361,047,670.33/20,155.05
  6. Step 6: Final answer
    x = 17,913.51

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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.