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Finding the Fourth Proportional to 15,879.38, 21,913.54 and 8,807.27

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Solution

The fourth proportional to 15,879.38, 21,913.54 and 8,807.27 is: 12,154.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,879.38 : 21,913.54 = 8,807.27 : x
  2. Step 2: Convert to fraction form
    15,879.38/21,913.54 = 8,807.27/x
  3. Step 3: Cross multiply
    15,879.38x = 21,913.54 × 8,807.27
  4. Step 4: Simplify right side
    15,879.38x = 192,998,331.85
  5. Step 5: Solve for x
    x = 192,998,331.85/15,879.38
  6. Step 6: Final answer
    x = 12,154.03

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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.