Home / 20,404.76-28,131.49-13,318.88

Finding the Fourth Proportional to 20,404.76, 28,131.49 and 13,318.88

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Solution

The fourth proportional to 20,404.76, 28,131.49 and 13,318.88 is: 18,362.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,404.76 : 28,131.49 = 13,318.88 : x
  2. Step 2: Convert to fraction form
    20,404.76/28,131.49 = 13,318.88/x
  3. Step 3: Cross multiply
    20,404.76x = 28,131.49 × 13,318.88
  4. Step 4: Simplify right side
    20,404.76x = 374,679,798.87
  5. Step 5: Solve for x
    x = 374,679,798.87/20,404.76
  6. Step 6: Final answer
    x = 18,362.38

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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.