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Finding the Fourth Proportional to 15,009.45, 20,713.10 and 8,295.09

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Solution

The fourth proportional to 15,009.45, 20,713.10 and 8,295.09 is: 11,447.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,009.45 : 20,713.10 = 8,295.09 : x
  2. Step 2: Convert to fraction form
    15,009.45/20,713.10 = 8,295.09/x
  3. Step 3: Cross multiply
    15,009.45x = 20,713.10 × 8,295.09
  4. Step 4: Simplify right side
    15,009.45x = 171,816,987.20
  5. Step 5: Solve for x
    x = 171,816,987.20/15,009.45
  6. Step 6: Final answer
    x = 11,447.25

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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.