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Finding the Fourth Proportional to 15,208.98, 20,988.41 and 8,494.61

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Solution

The fourth proportional to 15,208.98, 20,988.41 and 8,494.61 is: 11,722.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,208.98 : 20,988.41 = 8,494.61 : x
  2. Step 2: Convert to fraction form
    15,208.98/20,988.41 = 8,494.61/x
  3. Step 3: Cross multiply
    15,208.98x = 20,988.41 × 8,494.61
  4. Step 4: Simplify right side
    15,208.98x = 178,288,210.06
  5. Step 5: Solve for x
    x = 178,288,210.06/15,208.98
  6. Step 6: Final answer
    x = 11,722.56

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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.