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Finding the Fourth Proportional to 18,680.40, 25,778.60 and 10,182.60

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Solution

The fourth proportional to 18,680.40, 25,778.60 and 10,182.60 is: 14,051.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,680.40 : 25,778.60 = 10,182.60 : x
  2. Step 2: Convert to fraction form
    18,680.40/25,778.60 = 10,182.60/x
  3. Step 3: Cross multiply
    18,680.40x = 25,778.60 × 10,182.60
  4. Step 4: Simplify right side
    18,680.40x = 262,493,172.36
  5. Step 5: Solve for x
    x = 262,493,172.36/18,680.40
  6. Step 6: Final answer
    x = 14,051.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.