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Finding the Fourth Proportional to 39,884.40, 59,815.80 and 11,804.40

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Solution

The fourth proportional to 39,884.40, 59,815.80 and 11,804.40 is: 17,703.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,884.40 : 59,815.80 = 11,804.40 : x
  2. Step 2: Convert to fraction form
    39,884.40/59,815.80 = 11,804.40/x
  3. Step 3: Cross multiply
    39,884.40x = 59,815.80 × 11,804.40
  4. Step 4: Simplify right side
    39,884.40x = 706,089,629.52
  5. Step 5: Solve for x
    x = 706,089,629.52/39,884.40
  6. Step 6: Final answer
    x = 17,703.40

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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.