Home / 7,911.92-11,869.68-4,212.20

Finding the Fourth Proportional to 7,911.92, 11,869.68 and 4,212.20

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Solution

The fourth proportional to 7,911.92, 11,869.68 and 4,212.20 is: 6,319.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.92 : 11,869.68 = 4,212.20 : x
  2. Step 2: Convert to fraction form
    7,911.92/11,869.68 = 4,212.20/x
  3. Step 3: Cross multiply
    7,911.92x = 11,869.68 × 4,212.20
  4. Step 4: Simplify right side
    7,911.92x = 49,997,466.10
  5. Step 5: Solve for x
    x = 49,997,466.10/7,911.92
  6. Step 6: Final answer
    x = 6,319.26

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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.