Home / 20,271.60-30,414.96-12,390.30

Finding the Fourth Proportional to 20,271.60, 30,414.96 and 12,390.30

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Solution

The fourth proportional to 20,271.60, 30,414.96 and 12,390.30 is: 18,590.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,271.60 : 30,414.96 = 12,390.30 : x
  2. Step 2: Convert to fraction form
    20,271.60/30,414.96 = 12,390.30/x
  3. Step 3: Cross multiply
    20,271.60x = 30,414.96 × 12,390.30
  4. Step 4: Simplify right side
    20,271.60x = 376,850,478.89
  5. Step 5: Solve for x
    x = 376,850,478.89/20,271.60
  6. Step 6: Final answer
    x = 18,590.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.