Home / 20,906.47-28,841.52-12,408.95

Finding the Fourth Proportional to 20,906.47, 28,841.52 and 12,408.95

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Solution

The fourth proportional to 20,906.47, 28,841.52 and 12,408.95 is: 17,118.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.47 : 28,841.52 = 12,408.95 : x
  2. Step 2: Convert to fraction form
    20,906.47/28,841.52 = 12,408.95/x
  3. Step 3: Cross multiply
    20,906.47x = 28,841.52 × 12,408.95
  4. Step 4: Simplify right side
    20,906.47x = 357,892,979.60
  5. Step 5: Solve for x
    x = 357,892,979.60/20,906.47
  6. Step 6: Final answer
    x = 17,118.77

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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.