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Finding the Fourth Proportional to 21,608.40, 32,412.60 and 16,424.40

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Solution

The fourth proportional to 21,608.40, 32,412.60 and 16,424.40 is: 24,636.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,608.40 : 32,412.60 = 16,424.40 : x
  2. Step 2: Convert to fraction form
    21,608.40/32,412.60 = 16,424.40/x
  3. Step 3: Cross multiply
    21,608.40x = 32,412.60 × 16,424.40
  4. Step 4: Simplify right side
    21,608.40x = 532,357,507.44
  5. Step 5: Solve for x
    x = 532,357,507.44/21,608.40
  6. Step 6: Final answer
    x = 24,636.60

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.