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Finding the Fourth Proportional to 35,809.56, 53,720.82 and 12,429.72

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Solution

The fourth proportional to 35,809.56, 53,720.82 and 12,429.72 is: 18,646.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,809.56 : 53,720.82 = 12,429.72 : x
  2. Step 2: Convert to fraction form
    35,809.56/53,720.82 = 12,429.72/x
  3. Step 3: Cross multiply
    35,809.56x = 53,720.82 × 12,429.72
  4. Step 4: Simplify right side
    35,809.56x = 667,734,750.77
  5. Step 5: Solve for x
    x = 667,734,750.77/35,809.56
  6. Step 6: Final answer
    x = 18,646.83

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.