Home / 21,622.40-32,408.40-9,936.80

Finding the Fourth Proportional to 21,622.40, 32,408.40 and 9,936.80

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Solution

The fourth proportional to 21,622.40, 32,408.40 and 9,936.80 is: 14,893.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,622.40 : 32,408.40 = 9,936.80 : x
  2. Step 2: Convert to fraction form
    21,622.40/32,408.40 = 9,936.80/x
  3. Step 3: Cross multiply
    21,622.40x = 32,408.40 × 9,936.80
  4. Step 4: Simplify right side
    21,622.40x = 322,035,789.12
  5. Step 5: Solve for x
    x = 322,035,789.12/21,622.40
  6. Step 6: Final answer
    x = 14,893.62

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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.