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Finding the Fourth Proportional to 15,879.02, 21,913.74 and 8,804.96

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Solution

The fourth proportional to 15,879.02, 21,913.74 and 8,804.96 is: 12,151.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,879.02 : 21,913.74 = 8,804.96 : x
  2. Step 2: Convert to fraction form
    15,879.02/21,913.74 = 8,804.96/x
  3. Step 3: Cross multiply
    15,879.02x = 21,913.74 × 8,804.96
  4. Step 4: Simplify right side
    15,879.02x = 192,949,604.15
  5. Step 5: Solve for x
    x = 192,949,604.15/15,879.02
  6. Step 6: Final answer
    x = 12,151.23

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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.