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Finding the Fourth Proportional to 8,920.48, 12,309.90 and 4,941.76

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Solution

The fourth proportional to 8,920.48, 12,309.90 and 4,941.76 is: 6,819.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.48 : 12,309.90 = 4,941.76 : x
  2. Step 2: Convert to fraction form
    8,920.48/12,309.90 = 4,941.76/x
  3. Step 3: Cross multiply
    8,920.48x = 12,309.90 × 4,941.76
  4. Step 4: Simplify right side
    8,920.48x = 60,832,571.42
  5. Step 5: Solve for x
    x = 60,832,571.42/8,920.48
  6. Step 6: Final answer
    x = 6,819.43

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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.