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Finding the Fourth Proportional to 15,704.06, 21,672 and 8,630.66

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Solution

The fourth proportional to 15,704.06, 21,672 and 8,630.66 is: 11,910.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,704.06 : 21,672 = 8,630.66 : x
  2. Step 2: Convert to fraction form
    15,704.06/21,672 = 8,630.66/x
  3. Step 3: Cross multiply
    15,704.06x = 21,672 × 8,630.66
  4. Step 4: Simplify right side
    15,704.06x = 187,043,663.52
  5. Step 5: Solve for x
    x = 187,043,663.52/15,704.06
  6. Step 6: Final answer
    x = 11,910.53

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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.