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Finding the Fourth Proportional to 12,359.80, 18,582.90 and 12,100.60

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Solution

The fourth proportional to 12,359.80, 18,582.90 and 12,100.60 is: 18,193.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,359.80 : 18,582.90 = 12,100.60 : x
  2. Step 2: Convert to fraction form
    12,359.80/18,582.90 = 12,100.60/x
  3. Step 3: Cross multiply
    12,359.80x = 18,582.90 × 12,100.60
  4. Step 4: Simplify right side
    12,359.80x = 224,864,239.74
  5. Step 5: Solve for x
    x = 224,864,239.74/12,359.80
  6. Step 6: Final answer
    x = 18,193.19

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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.