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Finding the Fourth Proportional to 15,107.05, 20,847.71 and 8,393.30

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Solution

The fourth proportional to 15,107.05, 20,847.71 and 8,393.30 is: 11,582.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,107.05 : 20,847.71 = 8,393.30 : x
  2. Step 2: Convert to fraction form
    15,107.05/20,847.71 = 8,393.30/x
  3. Step 3: Cross multiply
    15,107.05x = 20,847.71 × 8,393.30
  4. Step 4: Simplify right side
    15,107.05x = 174,981,079.27
  5. Step 5: Solve for x
    x = 174,981,079.27/15,107.05
  6. Step 6: Final answer
    x = 11,582.74

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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.