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Finding the Fourth Proportional to 15,070.70, 20,796.97 and 8,356.44

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Solution

The fourth proportional to 15,070.70, 20,796.97 and 8,356.44 is: 11,531.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,070.70 : 20,796.97 = 8,356.44 : x
  2. Step 2: Convert to fraction form
    15,070.70/20,796.97 = 8,356.44/x
  3. Step 3: Cross multiply
    15,070.70x = 20,796.97 × 8,356.44
  4. Step 4: Simplify right side
    15,070.70x = 173,788,631.99
  5. Step 5: Solve for x
    x = 173,788,631.99/15,070.70
  6. Step 6: Final answer
    x = 11,531.56

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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.