Home / 21,840.30-32,732.10-10,128.60

Finding the Fourth Proportional to 21,840.30, 32,732.10 and 10,128.60

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Solution

The fourth proportional to 21,840.30, 32,732.10 and 10,128.60 is: 15,179.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,840.30 : 32,732.10 = 10,128.60 : x
  2. Step 2: Convert to fraction form
    21,840.30/32,732.10 = 10,128.60/x
  3. Step 3: Cross multiply
    21,840.30x = 32,732.10 × 10,128.60
  4. Step 4: Simplify right side
    21,840.30x = 331,530,348.06
  5. Step 5: Solve for x
    x = 331,530,348.06/21,840.30
  6. Step 6: Final answer
    x = 15,179.75

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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.