Home / 13,708.08-18,916.20-8,118

Finding the Fourth Proportional to 13,708.08, 18,916.20 and 8,118

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Solution

The fourth proportional to 13,708.08, 18,916.20 and 8,118 is: 11,202.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.08 : 18,916.20 = 8,118 : x
  2. Step 2: Convert to fraction form
    13,708.08/18,916.20 = 8,118/x
  3. Step 3: Cross multiply
    13,708.08x = 18,916.20 × 8,118
  4. Step 4: Simplify right side
    13,708.08x = 153,561,711.60
  5. Step 5: Solve for x
    x = 153,561,711.60/13,708.08
  6. Step 6: Final answer
    x = 11,202.28

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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.