Home / 20,840.48-28,760.20-11,408.88

Finding the Fourth Proportional to 20,840.48, 28,760.20 and 11,408.88

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Solution

The fourth proportional to 20,840.48, 28,760.20 and 11,408.88 is: 15,744.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.48 : 28,760.20 = 11,408.88 : x
  2. Step 2: Convert to fraction form
    20,840.48/28,760.20 = 11,408.88/x
  3. Step 3: Cross multiply
    20,840.48x = 28,760.20 × 11,408.88
  4. Step 4: Simplify right side
    20,840.48x = 328,121,670.58
  5. Step 5: Solve for x
    x = 328,121,670.58/20,840.48
  6. Step 6: Final answer
    x = 15,744.44

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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.