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Finding the Fourth Proportional to 21,979.26, 32,969.79 and 6,396.89

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Solution

The fourth proportional to 21,979.26, 32,969.79 and 6,396.89 is: 9,595.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.26 : 32,969.79 = 6,396.89 : x
  2. Step 2: Convert to fraction form
    21,979.26/32,969.79 = 6,396.89/x
  3. Step 3: Cross multiply
    21,979.26x = 32,969.79 × 6,396.89
  4. Step 4: Simplify right side
    21,979.26x = 210,903,955.10
  5. Step 5: Solve for x
    x = 210,903,955.10/21,979.26
  6. Step 6: Final answer
    x = 9,595.59

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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.