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Finding the Fourth Proportional to 21,391.51, 32,090.03 and 8,247.64

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Solution

The fourth proportional to 21,391.51, 32,090.03 and 8,247.64 is: 12,372.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.51 : 32,090.03 = 8,247.64 : x
  2. Step 2: Convert to fraction form
    21,391.51/32,090.03 = 8,247.64/x
  3. Step 3: Cross multiply
    21,391.51x = 32,090.03 × 8,247.64
  4. Step 4: Simplify right side
    21,391.51x = 264,667,015.03
  5. Step 5: Solve for x
    x = 264,667,015.03/21,391.51
  6. Step 6: Final answer
    x = 12,372.53

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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.