Home / 20,954.24-28,909.78-11,878.63

Finding the Fourth Proportional to 20,954.24, 28,909.78 and 11,878.63

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Solution

The fourth proportional to 20,954.24, 28,909.78 and 11,878.63 is: 16,388.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,954.24 : 28,909.78 = 11,878.63 : x
  2. Step 2: Convert to fraction form
    20,954.24/28,909.78 = 11,878.63/x
  3. Step 3: Cross multiply
    20,954.24x = 28,909.78 × 11,878.63
  4. Step 4: Simplify right side
    20,954.24x = 343,408,659.86
  5. Step 5: Solve for x
    x = 343,408,659.86/20,954.24
  6. Step 6: Final answer
    x = 16,388.50

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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.