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Finding the Fourth Proportional to 15,069.50, 20,796.38 and 8,355.74

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Solution

The fourth proportional to 15,069.50, 20,796.38 and 8,355.74 is: 11,531.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,069.50 : 20,796.38 = 8,355.74 : x
  2. Step 2: Convert to fraction form
    15,069.50/20,796.38 = 8,355.74/x
  3. Step 3: Cross multiply
    15,069.50x = 20,796.38 × 8,355.74
  4. Step 4: Simplify right side
    15,069.50x = 173,769,144.22
  5. Step 5: Solve for x
    x = 173,769,144.22/15,069.50
  6. Step 6: Final answer
    x = 11,531.18

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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.