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Finding the Fourth Proportional to 17,819.20, 26,728.80 and 4,672.90

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Solution

The fourth proportional to 17,819.20, 26,728.80 and 4,672.90 is: 7,009.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,819.20 : 26,728.80 = 4,672.90 : x
  2. Step 2: Convert to fraction form
    17,819.20/26,728.80 = 4,672.90/x
  3. Step 3: Cross multiply
    17,819.20x = 26,728.80 × 4,672.90
  4. Step 4: Simplify right side
    17,819.20x = 124,901,009.52
  5. Step 5: Solve for x
    x = 124,901,009.52/17,819.20
  6. Step 6: Final answer
    x = 7,009.35

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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.