Home / 20,410.76-28,170.78-11,913.88

Finding the Fourth Proportional to 20,410.76, 28,170.78 and 11,913.88

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Solution

The fourth proportional to 20,410.76, 28,170.78 and 11,913.88 is: 16,443.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,410.76 : 28,170.78 = 11,913.88 : x
  2. Step 2: Convert to fraction form
    20,410.76/28,170.78 = 11,913.88/x
  3. Step 3: Cross multiply
    20,410.76x = 28,170.78 × 11,913.88
  4. Step 4: Simplify right side
    20,410.76x = 335,623,292.43
  5. Step 5: Solve for x
    x = 335,623,292.43/20,410.76
  6. Step 6: Final answer
    x = 16,443.45

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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.