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Finding the Fourth Proportional to 15,098.70, 20,836.40 and 8,384.75

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Solution

The fourth proportional to 15,098.70, 20,836.40 and 8,384.75 is: 11,571.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,098.70 : 20,836.40 = 8,384.75 : x
  2. Step 2: Convert to fraction form
    15,098.70/20,836.40 = 8,384.75/x
  3. Step 3: Cross multiply
    15,098.70x = 20,836.40 × 8,384.75
  4. Step 4: Simplify right side
    15,098.70x = 174,707,858.79
  5. Step 5: Solve for x
    x = 174,707,858.79/15,098.70
  6. Step 6: Final answer
    x = 11,571.05

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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.