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Finding the Fourth Proportional to 15,216.98, 20,999.46 and 8,502.62

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Solution

The fourth proportional to 15,216.98, 20,999.46 and 8,502.62 is: 11,733.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,216.98 : 20,999.46 = 8,502.62 : x
  2. Step 2: Convert to fraction form
    15,216.98/20,999.46 = 8,502.62/x
  3. Step 3: Cross multiply
    15,216.98x = 20,999.46 × 8,502.62
  4. Step 4: Simplify right side
    15,216.98x = 178,550,428.59
  5. Step 5: Solve for x
    x = 178,550,428.59/15,216.98
  6. Step 6: Final answer
    x = 11,733.63

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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.