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Finding the Fourth Proportional to 15,021.97, 20,730.54 and 8,308.15

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Solution

The fourth proportional to 15,021.97, 20,730.54 and 8,308.15 is: 11,465.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,021.97 : 20,730.54 = 8,308.15 : x
  2. Step 2: Convert to fraction form
    15,021.97/20,730.54 = 8,308.15/x
  3. Step 3: Cross multiply
    15,021.97x = 20,730.54 × 8,308.15
  4. Step 4: Simplify right side
    15,021.97x = 172,232,435.90
  5. Step 5: Solve for x
    x = 172,232,435.90/15,021.97
  6. Step 6: Final answer
    x = 11,465.37

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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.