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Finding the Fourth Proportional to 15,189.98, 20,962.22 and 8,475.89

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Solution

The fourth proportional to 15,189.98, 20,962.22 and 8,475.89 is: 11,696.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,189.98 : 20,962.22 = 8,475.89 : x
  2. Step 2: Convert to fraction form
    15,189.98/20,962.22 = 8,475.89/x
  3. Step 3: Cross multiply
    15,189.98x = 20,962.22 × 8,475.89
  4. Step 4: Simplify right side
    15,189.98x = 177,673,366.06
  5. Step 5: Solve for x
    x = 177,673,366.06/15,189.98
  6. Step 6: Final answer
    x = 11,696.75

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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.