Home / 21,431.60-32,138.36-8,102.34

Finding the Fourth Proportional to 21,431.60, 32,138.36 and 8,102.34

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Solution

The fourth proportional to 21,431.60, 32,138.36 and 8,102.34 is: 12,150.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.60 : 32,138.36 = 8,102.34 : x
  2. Step 2: Convert to fraction form
    21,431.60/32,138.36 = 8,102.34/x
  3. Step 3: Cross multiply
    21,431.60x = 32,138.36 × 8,102.34
  4. Step 4: Simplify right side
    21,431.60x = 260,395,879.25
  5. Step 5: Solve for x
    x = 260,395,879.25/21,431.60
  6. Step 6: Final answer
    x = 12,150.09

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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.