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Finding the Fourth Proportional to 15,069.81, 20,794.32 and 8,355.09

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Solution

The fourth proportional to 15,069.81, 20,794.32 and 8,355.09 is: 11,528.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,069.81 : 20,794.32 = 8,355.09 : x
  2. Step 2: Convert to fraction form
    15,069.81/20,794.32 = 8,355.09/x
  3. Step 3: Cross multiply
    15,069.81x = 20,794.32 × 8,355.09
  4. Step 4: Simplify right side
    15,069.81x = 173,738,415.09
  5. Step 5: Solve for x
    x = 173,738,415.09/15,069.81
  6. Step 6: Final answer
    x = 11,528.91

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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.