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Finding the Fourth Proportional to 13,903, 19,186.15 and 7,615.60

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Solution

The fourth proportional to 13,903, 19,186.15 and 7,615.60 is: 10,509.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,903 : 19,186.15 = 7,615.60 : x
  2. Step 2: Convert to fraction form
    13,903/19,186.15 = 7,615.60/x
  3. Step 3: Cross multiply
    13,903x = 19,186.15 × 7,615.60
  4. Step 4: Simplify right side
    13,903x = 146,114,005.86
  5. Step 5: Solve for x
    x = 146,114,005.86/13,903
  6. Step 6: Final answer
    x = 10,509.53

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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.