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Finding the Fourth Proportional to 15,010.10, 20,709.81 and 8,636.42

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Solution

The fourth proportional to 15,010.10, 20,709.81 and 8,636.42 is: 11,915.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,010.10 : 20,709.81 = 8,636.42 : x
  2. Step 2: Convert to fraction form
    15,010.10/20,709.81 = 8,636.42/x
  3. Step 3: Cross multiply
    15,010.10x = 20,709.81 × 8,636.42
  4. Step 4: Simplify right side
    15,010.10x = 178,858,617.28
  5. Step 5: Solve for x
    x = 178,858,617.28/15,010.10
  6. Step 6: Final answer
    x = 11,915.88

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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.