Home / 20,731.48-28,610.11-11,778.45

Finding the Fourth Proportional to 20,731.48, 28,610.11 and 11,778.45

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Solution

The fourth proportional to 20,731.48, 28,610.11 and 11,778.45 is: 16,254.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.48 : 28,610.11 = 11,778.45 : x
  2. Step 2: Convert to fraction form
    20,731.48/28,610.11 = 11,778.45/x
  3. Step 3: Cross multiply
    20,731.48x = 28,610.11 × 11,778.45
  4. Step 4: Simplify right side
    20,731.48x = 336,982,607.08
  5. Step 5: Solve for x
    x = 336,982,607.08/20,731.48
  6. Step 6: Final answer
    x = 16,254.64

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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.