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Finding the Fourth Proportional to 57,859.44, 86,763.64 and 20,408.48

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Solution

The fourth proportional to 57,859.44, 86,763.64 and 20,408.48 is: 30,603.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,859.44 : 86,763.64 = 20,408.48 : x
  2. Step 2: Convert to fraction form
    57,859.44/86,763.64 = 20,408.48/x
  3. Step 3: Cross multiply
    57,859.44x = 86,763.64 × 20,408.48
  4. Step 4: Simplify right side
    57,859.44x = 1,770,714,011.67
  5. Step 5: Solve for x
    x = 1,770,714,011.67/57,859.44
  6. Step 6: Final answer
    x = 30,603.72

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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.