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Finding the Fourth Proportional to 21,841.60, 32,762.40 and 12,481.60

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Solution

The fourth proportional to 21,841.60, 32,762.40 and 12,481.60 is: 18,722.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,841.60 : 32,762.40 = 12,481.60 : x
  2. Step 2: Convert to fraction form
    21,841.60/32,762.40 = 12,481.60/x
  3. Step 3: Cross multiply
    21,841.60x = 32,762.40 × 12,481.60
  4. Step 4: Simplify right side
    21,841.60x = 408,927,171.84
  5. Step 5: Solve for x
    x = 408,927,171.84/21,841.60
  6. Step 6: Final answer
    x = 18,722.40

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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.