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Finding the Fourth Proportional to 8,920.55, 12,310.36 and 4,941.91

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Solution

The fourth proportional to 8,920.55, 12,310.36 and 4,941.91 is: 6,819.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.55 : 12,310.36 = 4,941.91 : x
  2. Step 2: Convert to fraction form
    8,920.55/12,310.36 = 4,941.91/x
  3. Step 3: Cross multiply
    8,920.55x = 12,310.36 × 4,941.91
  4. Step 4: Simplify right side
    8,920.55x = 60,836,722.02
  5. Step 5: Solve for x
    x = 60,836,722.02/8,920.55
  6. Step 6: Final answer
    x = 6,819.84

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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.