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Finding the Fourth Proportional to 15,009.98, 20,713.11 and 8,636.30

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Solution

The fourth proportional to 15,009.98, 20,713.11 and 8,636.30 is: 11,917.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,009.98 : 20,713.11 = 8,636.30 : x
  2. Step 2: Convert to fraction form
    15,009.98/20,713.11 = 8,636.30/x
  3. Step 3: Cross multiply
    15,009.98x = 20,713.11 × 8,636.30
  4. Step 4: Simplify right side
    15,009.98x = 178,884,631.89
  5. Step 5: Solve for x
    x = 178,884,631.89/15,009.98
  6. Step 6: Final answer
    x = 11,917.71

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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.