Home / 13,403.43-18,519.75-12,930.39

Finding the Fourth Proportional to 13,403.43, 18,519.75 and 12,930.39

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Solution

The fourth proportional to 13,403.43, 18,519.75 and 12,930.39 is: 17,866.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,403.43 : 18,519.75 = 12,930.39 : x
  2. Step 2: Convert to fraction form
    13,403.43/18,519.75 = 12,930.39/x
  3. Step 3: Cross multiply
    13,403.43x = 18,519.75 × 12,930.39
  4. Step 4: Simplify right side
    13,403.43x = 239,467,590.20
  5. Step 5: Solve for x
    x = 239,467,590.20/13,403.43
  6. Step 6: Final answer
    x = 17,866.14

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1.5x scale

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.