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Finding the Fourth Proportional to 7,886.10, 11,819.10 and 4,190.10

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Solution

The fourth proportional to 7,886.10, 11,819.10 and 4,190.10 is: 6,279.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,886.10 : 11,819.10 = 4,190.10 : x
  2. Step 2: Convert to fraction form
    7,886.10/11,819.10 = 4,190.10/x
  3. Step 3: Cross multiply
    7,886.10x = 11,819.10 × 4,190.10
  4. Step 4: Simplify right side
    7,886.10x = 49,523,210.91
  5. Step 5: Solve for x
    x = 49,523,210.91/7,886.10
  6. Step 6: Final answer
    x = 6,279.81

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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.