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Finding the Fourth Proportional to 35,405.60, 53,131.04 and 18,758.56

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Solution

The fourth proportional to 35,405.60, 53,131.04 and 18,758.56 is: 28,149.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,405.60 : 53,131.04 = 18,758.56 : x
  2. Step 2: Convert to fraction form
    35,405.60/53,131.04 = 18,758.56/x
  3. Step 3: Cross multiply
    35,405.60x = 53,131.04 × 18,758.56
  4. Step 4: Simplify right side
    35,405.60x = 996,661,801.70
  5. Step 5: Solve for x
    x = 996,661,801.70/35,405.60
  6. Step 6: Final answer
    x = 28,149.84

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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.