Home / 12,400.89-18,590.70-4,078.68

Finding the Fourth Proportional to 12,400.89, 18,590.70 and 4,078.68

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Solution

The fourth proportional to 12,400.89, 18,590.70 and 4,078.68 is: 6,114.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,400.89 : 18,590.70 = 4,078.68 : x
  2. Step 2: Convert to fraction form
    12,400.89/18,590.70 = 4,078.68/x
  3. Step 3: Cross multiply
    12,400.89x = 18,590.70 × 4,078.68
  4. Step 4: Simplify right side
    12,400.89x = 75,825,516.28
  5. Step 5: Solve for x
    x = 75,825,516.28/12,400.89
  6. Step 6: Final answer
    x = 6,114.52

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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.