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Finding the Fourth Proportional to 21,992.40, 32,988.60 and 16,743.60

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Solution

The fourth proportional to 21,992.40, 32,988.60 and 16,743.60 is: 25,115.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,992.40 : 32,988.60 = 16,743.60 : x
  2. Step 2: Convert to fraction form
    21,992.40/32,988.60 = 16,743.60/x
  3. Step 3: Cross multiply
    21,992.40x = 32,988.60 × 16,743.60
  4. Step 4: Simplify right side
    21,992.40x = 552,347,922.96
  5. Step 5: Solve for x
    x = 552,347,922.96/21,992.40
  6. Step 6: Final answer
    x = 25,115.40

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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.