Home / 20,786.76-28,686.15-11,355.93

Finding the Fourth Proportional to 20,786.76, 28,686.15 and 11,355.93

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Solution

The fourth proportional to 20,786.76, 28,686.15 and 11,355.93 is: 15,671.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.76 : 28,686.15 = 11,355.93 : x
  2. Step 2: Convert to fraction form
    20,786.76/28,686.15 = 11,355.93/x
  3. Step 3: Cross multiply
    20,786.76x = 28,686.15 × 11,355.93
  4. Step 4: Simplify right side
    20,786.76x = 325,757,911.37
  5. Step 5: Solve for x
    x = 325,757,911.37/20,786.76
  6. Step 6: Final answer
    x = 15,671.41

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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.