Home / 13,786.10-19,029.11-7,821.71

Finding the Fourth Proportional to 13,786.10, 19,029.11 and 7,821.71

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Solution

The fourth proportional to 13,786.10, 19,029.11 and 7,821.71 is: 10,796.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,786.10 : 19,029.11 = 7,821.71 : x
  2. Step 2: Convert to fraction form
    13,786.10/19,029.11 = 7,821.71/x
  3. Step 3: Cross multiply
    13,786.10x = 19,029.11 × 7,821.71
  4. Step 4: Simplify right side
    13,786.10x = 148,840,045.72
  5. Step 5: Solve for x
    x = 148,840,045.72/13,786.10
  6. Step 6: Final answer
    x = 10,796.39

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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.