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Finding the Fourth Proportional to 15,007.98, 20,709.20 and 8,293.20

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Solution

The fourth proportional to 15,007.98, 20,709.20 and 8,293.20 is: 11,443.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,007.98 : 20,709.20 = 8,293.20 : x
  2. Step 2: Convert to fraction form
    15,007.98/20,709.20 = 8,293.20/x
  3. Step 3: Cross multiply
    15,007.98x = 20,709.20 × 8,293.20
  4. Step 4: Simplify right side
    15,007.98x = 171,745,537.44
  5. Step 5: Solve for x
    x = 171,745,537.44/15,007.98
  6. Step 6: Final answer
    x = 11,443.61

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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.