Home / 8,919.72-12,309.90-4,941.21

Finding the Fourth Proportional to 8,919.72, 12,309.90 and 4,941.21

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Solution

The fourth proportional to 8,919.72, 12,309.90 and 4,941.21 is: 6,819.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.72 : 12,309.90 = 4,941.21 : x
  2. Step 2: Convert to fraction form
    8,919.72/12,309.90 = 4,941.21/x
  3. Step 3: Cross multiply
    8,919.72x = 12,309.90 × 4,941.21
  4. Step 4: Simplify right side
    8,919.72x = 60,825,800.98
  5. Step 5: Solve for x
    x = 60,825,800.98/8,919.72
  6. Step 6: Final answer
    x = 6,819.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.