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Finding the Fourth Proportional to 18,672.40, 28,003.20 and 6,824.80

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Solution

The fourth proportional to 18,672.40, 28,003.20 and 6,824.80 is: 10,235.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.40 : 28,003.20 = 6,824.80 : x
  2. Step 2: Convert to fraction form
    18,672.40/28,003.20 = 6,824.80/x
  3. Step 3: Cross multiply
    18,672.40x = 28,003.20 × 6,824.80
  4. Step 4: Simplify right side
    18,672.40x = 191,116,239.36
  5. Step 5: Solve for x
    x = 191,116,239.36/18,672.40
  6. Step 6: Final answer
    x = 10,235.23

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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.