Home / 20,730.22-28,607.80-11,778.21

Finding the Fourth Proportional to 20,730.22, 28,607.80 and 11,778.21

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Solution

The fourth proportional to 20,730.22, 28,607.80 and 11,778.21 is: 16,253.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.22 : 28,607.80 = 11,778.21 : x
  2. Step 2: Convert to fraction form
    20,730.22/28,607.80 = 11,778.21/x
  3. Step 3: Cross multiply
    20,730.22x = 28,607.80 × 11,778.21
  4. Step 4: Simplify right side
    20,730.22x = 336,948,676.04
  5. Step 5: Solve for x
    x = 336,948,676.04/20,730.22
  6. Step 6: Final answer
    x = 16,253.98

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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.