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Finding the Fourth Proportional to 11,819.70, 17,729.55 and 4,894.20

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Solution

The fourth proportional to 11,819.70, 17,729.55 and 4,894.20 is: 7,341.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,819.70 : 17,729.55 = 4,894.20 : x
  2. Step 2: Convert to fraction form
    11,819.70/17,729.55 = 4,894.20/x
  3. Step 3: Cross multiply
    11,819.70x = 17,729.55 × 4,894.20
  4. Step 4: Simplify right side
    11,819.70x = 86,771,963.61
  5. Step 5: Solve for x
    x = 86,771,963.61/11,819.70
  6. Step 6: Final answer
    x = 7,341.30

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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.