Home / 13,388.62-18,478.47-12,798.04

Finding the Fourth Proportional to 13,388.62, 18,478.47 and 12,798.04

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Solution

The fourth proportional to 13,388.62, 18,478.47 and 12,798.04 is: 17,663.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,388.62 : 18,478.47 = 12,798.04 : x
  2. Step 2: Convert to fraction form
    13,388.62/18,478.47 = 12,798.04/x
  3. Step 3: Cross multiply
    13,388.62x = 18,478.47 × 12,798.04
  4. Step 4: Simplify right side
    13,388.62x = 236,488,198.20
  5. Step 5: Solve for x
    x = 236,488,198.20/13,388.62
  6. Step 6: Final answer
    x = 17,663.37

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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.