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Finding the Fourth Proportional to 19,860.60, 27,405.60 and 11,902.68

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Solution

The fourth proportional to 19,860.60, 27,405.60 and 11,902.68 is: 16,424.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,860.60 : 27,405.60 = 11,902.68 : x
  2. Step 2: Convert to fraction form
    19,860.60/27,405.60 = 11,902.68/x
  3. Step 3: Cross multiply
    19,860.60x = 27,405.60 × 11,902.68
  4. Step 4: Simplify right side
    19,860.60x = 326,200,087.01
  5. Step 5: Solve for x
    x = 326,200,087.01/19,860.60
  6. Step 6: Final answer
    x = 16,424.48

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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.