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Finding the Fourth Proportional to 15,009.10, 20,712.44 and 8,295.18

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Solution

The fourth proportional to 15,009.10, 20,712.44 and 8,295.18 is: 11,447.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,009.10 : 20,712.44 = 8,295.18 : x
  2. Step 2: Convert to fraction form
    15,009.10/20,712.44 = 8,295.18/x
  3. Step 3: Cross multiply
    15,009.10x = 20,712.44 × 8,295.18
  4. Step 4: Simplify right side
    15,009.10x = 171,813,418.04
  5. Step 5: Solve for x
    x = 171,813,418.04/15,009.10
  6. Step 6: Final answer
    x = 11,447.28

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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.