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Finding the Fourth Proportional to 10,879.63, 15,015.92 and 6,403.16

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Solution

The fourth proportional to 10,879.63, 15,015.92 and 6,403.16 is: 8,837.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,879.63 : 15,015.92 = 6,403.16 : x
  2. Step 2: Convert to fraction form
    10,879.63/15,015.92 = 6,403.16/x
  3. Step 3: Cross multiply
    10,879.63x = 15,015.92 × 6,403.16
  4. Step 4: Simplify right side
    10,879.63x = 96,149,343.83
  5. Step 5: Solve for x
    x = 96,149,343.83/10,879.63
  6. Step 6: Final answer
    x = 8,837.56

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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.