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Finding the Fourth Proportional to 15,212.76, 20,994.42 and 8,498.54

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Solution

The fourth proportional to 15,212.76, 20,994.42 and 8,498.54 is: 11,728.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,212.76 : 20,994.42 = 8,498.54 : x
  2. Step 2: Convert to fraction form
    15,212.76/20,994.42 = 8,498.54/x
  3. Step 3: Cross multiply
    15,212.76x = 20,994.42 × 8,498.54
  4. Step 4: Simplify right side
    15,212.76x = 178,421,813.17
  5. Step 5: Solve for x
    x = 178,421,813.17/15,212.76
  6. Step 6: Final answer
    x = 11,728.43

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Half scale
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Double scale
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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.