Home / 13,780.62-18,995.42-12,636.52

Finding the Fourth Proportional to 13,780.62, 18,995.42 and 12,636.52

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Solution

The fourth proportional to 13,780.62, 18,995.42 and 12,636.52 is: 17,418.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.62 : 18,995.42 = 12,636.52 : x
  2. Step 2: Convert to fraction form
    13,780.62/18,995.42 = 12,636.52/x
  3. Step 3: Cross multiply
    13,780.62x = 18,995.42 × 12,636.52
  4. Step 4: Simplify right side
    13,780.62x = 240,036,004.74
  5. Step 5: Solve for x
    x = 240,036,004.74/13,780.62
  6. Step 6: Final answer
    x = 17,418.37

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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.