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Finding the Fourth Proportional to 30,900.48, 46,350.24 and 12,432

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Solution

The fourth proportional to 30,900.48, 46,350.24 and 12,432 is: 18,647.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,900.48 : 46,350.24 = 12,432 : x
  2. Step 2: Convert to fraction form
    30,900.48/46,350.24 = 12,432/x
  3. Step 3: Cross multiply
    30,900.48x = 46,350.24 × 12,432
  4. Step 4: Simplify right side
    30,900.48x = 576,226,183.68
  5. Step 5: Solve for x
    x = 576,226,183.68/30,900.48
  6. Step 6: Final answer
    x = 18,647.81

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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.