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Finding the Fourth Proportional to 21,662.60, 32,504.70 and 12,309.80

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Solution

The fourth proportional to 21,662.60, 32,504.70 and 12,309.80 is: 18,470.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,662.60 : 32,504.70 = 12,309.80 : x
  2. Step 2: Convert to fraction form
    21,662.60/32,504.70 = 12,309.80/x
  3. Step 3: Cross multiply
    21,662.60x = 32,504.70 × 12,309.80
  4. Step 4: Simplify right side
    21,662.60x = 400,126,356.06
  5. Step 5: Solve for x
    x = 400,126,356.06/21,662.60
  6. Step 6: Final answer
    x = 18,470.84

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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.