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Finding the Fourth Proportional to 15,100.21, 20,836.29 and 8,384.05

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Solution

The fourth proportional to 15,100.21, 20,836.29 and 8,384.05 is: 11,568.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,100.21 : 20,836.29 = 8,384.05 : x
  2. Step 2: Convert to fraction form
    15,100.21/20,836.29 = 8,384.05/x
  3. Step 3: Cross multiply
    15,100.21x = 20,836.29 × 8,384.05
  4. Step 4: Simplify right side
    15,100.21x = 174,692,497.17
  5. Step 5: Solve for x
    x = 174,692,497.17/15,100.21
  6. Step 6: Final answer
    x = 11,568.88

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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.