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Finding the Fourth Proportional to 15,108.30, 20,849.93 and 8,394.47

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Solution

The fourth proportional to 15,108.30, 20,849.93 and 8,394.47 is: 11,584.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,108.30 : 20,849.93 = 8,394.47 : x
  2. Step 2: Convert to fraction form
    15,108.30/20,849.93 = 8,394.47/x
  3. Step 3: Cross multiply
    15,108.30x = 20,849.93 × 8,394.47
  4. Step 4: Simplify right side
    15,108.30x = 175,023,965.67
  5. Step 5: Solve for x
    x = 175,023,965.67/15,108.30
  6. Step 6: Final answer
    x = 11,584.62

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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.