Home / 20,363.60-28,101.76-12,405.82

Finding the Fourth Proportional to 20,363.60, 28,101.76 and 12,405.82

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Solution

The fourth proportional to 20,363.60, 28,101.76 and 12,405.82 is: 17,120.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,363.60 : 28,101.76 = 12,405.82 : x
  2. Step 2: Convert to fraction form
    20,363.60/28,101.76 = 12,405.82/x
  3. Step 3: Cross multiply
    20,363.60x = 28,101.76 × 12,405.82
  4. Step 4: Simplify right side
    20,363.60x = 348,625,235.73
  5. Step 5: Solve for x
    x = 348,625,235.73/20,363.60
  6. Step 6: Final answer
    x = 17,120.02

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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.