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Finding the Fourth Proportional to 12,495.60, 18,721.80 and 8,110.80

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Solution

The fourth proportional to 12,495.60, 18,721.80 and 8,110.80 is: 12,152.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,495.60 : 18,721.80 = 8,110.80 : x
  2. Step 2: Convert to fraction form
    12,495.60/18,721.80 = 8,110.80/x
  3. Step 3: Cross multiply
    12,495.60x = 18,721.80 × 8,110.80
  4. Step 4: Simplify right side
    12,495.60x = 151,848,775.44
  5. Step 5: Solve for x
    x = 151,848,775.44/12,495.60
  6. Step 6: Final answer
    x = 12,152.18

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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.