Home / 20,765.13-28,658.62-11,810.91

Finding the Fourth Proportional to 20,765.13, 28,658.62 and 11,810.91

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Solution

The fourth proportional to 20,765.13, 28,658.62 and 11,810.91 is: 16,300.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.13 : 28,658.62 = 11,810.91 : x
  2. Step 2: Convert to fraction form
    20,765.13/28,658.62 = 11,810.91/x
  3. Step 3: Cross multiply
    20,765.13x = 28,658.62 × 11,810.91
  4. Step 4: Simplify right side
    20,765.13x = 338,484,238.25
  5. Step 5: Solve for x
    x = 338,484,238.25/20,765.13
  6. Step 6: Final answer
    x = 16,300.61

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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.