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Finding the Fourth Proportional to 15,099.05, 20,835.98 and 8,385.09

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Solution

The fourth proportional to 15,099.05, 20,835.98 and 8,385.09 is: 11,571.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,099.05 : 20,835.98 = 8,385.09 : x
  2. Step 2: Convert to fraction form
    15,099.05/20,835.98 = 8,385.09/x
  3. Step 3: Cross multiply
    15,099.05x = 20,835.98 × 8,385.09
  4. Step 4: Simplify right side
    15,099.05x = 174,711,525.61
  5. Step 5: Solve for x
    x = 174,711,525.61/15,099.05
  6. Step 6: Final answer
    x = 11,571.03

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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.