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Finding the Fourth Proportional to 13,168.15, 18,169.93 and 7,503

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Solution

The fourth proportional to 13,168.15, 18,169.93 and 7,503 is: 10,352.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,168.15 : 18,169.93 = 7,503 : x
  2. Step 2: Convert to fraction form
    13,168.15/18,169.93 = 7,503/x
  3. Step 3: Cross multiply
    13,168.15x = 18,169.93 × 7,503
  4. Step 4: Simplify right side
    13,168.15x = 136,328,984.79
  5. Step 5: Solve for x
    x = 136,328,984.79/13,168.15
  6. Step 6: Final answer
    x = 10,352.93

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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.