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Finding the Fourth Proportional to 21,969.60, 32,932.80 and 19,636.80

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Solution

The fourth proportional to 21,969.60, 32,932.80 and 19,636.80 is: 29,435.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.60 : 32,932.80 = 19,636.80 : x
  2. Step 2: Convert to fraction form
    21,969.60/32,932.80 = 19,636.80/x
  3. Step 3: Cross multiply
    21,969.60x = 32,932.80 × 19,636.80
  4. Step 4: Simplify right side
    21,969.60x = 646,694,807.04
  5. Step 5: Solve for x
    x = 646,694,807.04/21,969.60
  6. Step 6: Final answer
    x = 29,435.89

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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.