Home / 20,408.36-28,163.40-12,859.56

Finding the Fourth Proportional to 20,408.36, 28,163.40 and 12,859.56

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Solution

The fourth proportional to 20,408.36, 28,163.40 and 12,859.56 is: 17,746.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,408.36 : 28,163.40 = 12,859.56 : x
  2. Step 2: Convert to fraction form
    20,408.36/28,163.40 = 12,859.56/x
  3. Step 3: Cross multiply
    20,408.36x = 28,163.40 × 12,859.56
  4. Step 4: Simplify right side
    20,408.36x = 362,168,883.88
  5. Step 5: Solve for x
    x = 362,168,883.88/20,408.36
  6. Step 6: Final answer
    x = 17,746.11

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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.