Home / 13,429.80-20,137.77-7,108.09

Finding the Fourth Proportional to 13,429.80, 20,137.77 and 7,108.09

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Solution

The fourth proportional to 13,429.80, 20,137.77 and 7,108.09 is: 10,658.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,429.80 : 20,137.77 = 7,108.09 : x
  2. Step 2: Convert to fraction form
    13,429.80/20,137.77 = 7,108.09/x
  3. Step 3: Cross multiply
    13,429.80x = 20,137.77 × 7,108.09
  4. Step 4: Simplify right side
    13,429.80x = 143,141,031.21
  5. Step 5: Solve for x
    x = 143,141,031.21/13,429.80
  6. Step 6: Final answer
    x = 10,658.46

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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.