Home / 20,138.24-27,800.87-12,588.77

Finding the Fourth Proportional to 20,138.24, 27,800.87 and 12,588.77

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Solution

The fourth proportional to 20,138.24, 27,800.87 and 12,588.77 is: 17,378.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.24 : 27,800.87 = 12,588.77 : x
  2. Step 2: Convert to fraction form
    20,138.24/27,800.87 = 12,588.77/x
  3. Step 3: Cross multiply
    20,138.24x = 27,800.87 × 12,588.77
  4. Step 4: Simplify right side
    20,138.24x = 349,978,556.28
  5. Step 5: Solve for x
    x = 349,978,556.28/20,138.24
  6. Step 6: Final answer
    x = 17,378.81

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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.