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Finding the Fourth Proportional to 21,969.96, 32,960.40 and 7,179.72

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Solution

The fourth proportional to 21,969.96, 32,960.40 and 7,179.72 is: 10,771.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.96 : 32,960.40 = 7,179.72 : x
  2. Step 2: Convert to fraction form
    21,969.96/32,960.40 = 7,179.72/x
  3. Step 3: Cross multiply
    21,969.96x = 32,960.40 × 7,179.72
  4. Step 4: Simplify right side
    21,969.96x = 236,646,443.09
  5. Step 5: Solve for x
    x = 236,646,443.09/21,969.96
  6. Step 6: Final answer
    x = 10,771.36

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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.