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Finding the Fourth Proportional to 13,597.86, 20,400.03 and 5,278.08

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Solution

The fourth proportional to 13,597.86, 20,400.03 and 5,278.08 is: 7,918.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,597.86 : 20,400.03 = 5,278.08 : x
  2. Step 2: Convert to fraction form
    13,597.86/20,400.03 = 5,278.08/x
  3. Step 3: Cross multiply
    13,597.86x = 20,400.03 × 5,278.08
  4. Step 4: Simplify right side
    13,597.86x = 107,672,990.34
  5. Step 5: Solve for x
    x = 107,672,990.34/13,597.86
  6. Step 6: Final answer
    x = 7,918.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.