Home / 21,431.80-32,150.10-6,640.60

Finding the Fourth Proportional to 21,431.80, 32,150.10 and 6,640.60

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Solution

The fourth proportional to 21,431.80, 32,150.10 and 6,640.60 is: 9,961.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.80 : 32,150.10 = 6,640.60 : x
  2. Step 2: Convert to fraction form
    21,431.80/32,150.10 = 6,640.60/x
  3. Step 3: Cross multiply
    21,431.80x = 32,150.10 × 6,640.60
  4. Step 4: Simplify right side
    21,431.80x = 213,495,954.06
  5. Step 5: Solve for x
    x = 213,495,954.06/21,431.80
  6. Step 6: Final answer
    x = 9,961.64

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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.