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Finding the Fourth Proportional to 30,969.48, 46,456.80 and 9,912.60

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Solution

The fourth proportional to 30,969.48, 46,456.80 and 9,912.60 is: 14,869.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,969.48 : 46,456.80 = 9,912.60 : x
  2. Step 2: Convert to fraction form
    30,969.48/46,456.80 = 9,912.60/x
  3. Step 3: Cross multiply
    30,969.48x = 46,456.80 × 9,912.60
  4. Step 4: Simplify right side
    30,969.48x = 460,507,675.68
  5. Step 5: Solve for x
    x = 460,507,675.68/30,969.48
  6. Step 6: Final answer
    x = 14,869.73

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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.