Home / 20,908.76-28,840.97-12,404.87

Finding the Fourth Proportional to 20,908.76, 28,840.97 and 12,404.87

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Solution

The fourth proportional to 20,908.76, 28,840.97 and 12,404.87 is: 17,110.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.76 : 28,840.97 = 12,404.87 : x
  2. Step 2: Convert to fraction form
    20,908.76/28,840.97 = 12,404.87/x
  3. Step 3: Cross multiply
    20,908.76x = 28,840.97 × 12,404.87
  4. Step 4: Simplify right side
    20,908.76x = 357,768,277.29
  5. Step 5: Solve for x
    x = 357,768,277.29/20,908.76
  6. Step 6: Final answer
    x = 17,110.93

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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.