Home / 19,857.43-29,786.86-9,991.34

Finding the Fourth Proportional to 19,857.43, 29,786.86 and 9,991.34

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Solution

The fourth proportional to 19,857.43, 29,786.86 and 9,991.34 is: 14,987.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,857.43 : 29,786.86 = 9,991.34 : x
  2. Step 2: Convert to fraction form
    19,857.43/29,786.86 = 9,991.34/x
  3. Step 3: Cross multiply
    19,857.43x = 29,786.86 × 9,991.34
  4. Step 4: Simplify right side
    19,857.43x = 297,610,645.79
  5. Step 5: Solve for x
    x = 297,610,645.79/19,857.43
  6. Step 6: Final answer
    x = 14,987.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.