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Finding the Fourth Proportional to 21,957.94, 32,938.26 and 8,808.60

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Solution

The fourth proportional to 21,957.94, 32,938.26 and 8,808.60 is: 13,213.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,957.94 : 32,938.26 = 8,808.60 : x
  2. Step 2: Convert to fraction form
    21,957.94/32,938.26 = 8,808.60/x
  3. Step 3: Cross multiply
    21,957.94x = 32,938.26 × 8,808.60
  4. Step 4: Simplify right side
    21,957.94x = 290,139,957.04
  5. Step 5: Solve for x
    x = 290,139,957.04/21,957.94
  6. Step 6: Final answer
    x = 13,213.44

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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.