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Finding the Fourth Proportional to 13,484.78, 18,606 and 7,820.45

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Solution

The fourth proportional to 13,484.78, 18,606 and 7,820.45 is: 10,790.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,484.78 : 18,606 = 7,820.45 : x
  2. Step 2: Convert to fraction form
    13,484.78/18,606 = 7,820.45/x
  3. Step 3: Cross multiply
    13,484.78x = 18,606 × 7,820.45
  4. Step 4: Simplify right side
    13,484.78x = 145,507,292.70
  5. Step 5: Solve for x
    x = 145,507,292.70/13,484.78
  6. Step 6: Final answer
    x = 10,790.48

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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.