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Finding the Fourth Proportional to 39,573.70, 54,611.70 and 21,669.80

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Solution

The fourth proportional to 39,573.70, 54,611.70 and 21,669.80 is: 29,904.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,573.70 : 54,611.70 = 21,669.80 : x
  2. Step 2: Convert to fraction form
    39,573.70/54,611.70 = 21,669.80/x
  3. Step 3: Cross multiply
    39,573.70x = 54,611.70 × 21,669.80
  4. Step 4: Simplify right side
    39,573.70x = 1,183,424,616.66
  5. Step 5: Solve for x
    x = 1,183,424,616.66/39,573.70
  6. Step 6: Final answer
    x = 29,904.32

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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.