Home / 7,919.58-11,875.86-4,221.12

Finding the Fourth Proportional to 7,919.58, 11,875.86 and 4,221.12

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Solution

The fourth proportional to 7,919.58, 11,875.86 and 4,221.12 is: 6,329.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.58 : 11,875.86 = 4,221.12 : x
  2. Step 2: Convert to fraction form
    7,919.58/11,875.86 = 4,221.12/x
  3. Step 3: Cross multiply
    7,919.58x = 11,875.86 × 4,221.12
  4. Step 4: Simplify right side
    7,919.58x = 50,129,430.16
  5. Step 5: Solve for x
    x = 50,129,430.16/7,919.58
  6. Step 6: Final answer
    x = 6,329.81

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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.