Home / 8,405.27-12,590.91-4,239.48

Finding the Fourth Proportional to 8,405.27, 12,590.91 and 4,239.48

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Solution

The fourth proportional to 8,405.27, 12,590.91 and 4,239.48 is: 6,350.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,405.27 : 12,590.91 = 4,239.48 : x
  2. Step 2: Convert to fraction form
    8,405.27/12,590.91 = 4,239.48/x
  3. Step 3: Cross multiply
    8,405.27x = 12,590.91 × 4,239.48
  4. Step 4: Simplify right side
    8,405.27x = 53,378,911.13
  5. Step 5: Solve for x
    x = 53,378,911.13/8,405.27
  6. Step 6: Final answer
    x = 6,350.65

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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.