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Finding the Fourth Proportional to 30,309.86, 45,380.90 and 15,486.86

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Solution

The fourth proportional to 30,309.86, 45,380.90 and 15,486.86 is: 23,187.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,309.86 : 45,380.90 = 15,486.86 : x
  2. Step 2: Convert to fraction form
    30,309.86/45,380.90 = 15,486.86/x
  3. Step 3: Cross multiply
    30,309.86x = 45,380.90 × 15,486.86
  4. Step 4: Simplify right side
    30,309.86x = 702,807,644.97
  5. Step 5: Solve for x
    x = 702,807,644.97/30,309.86
  6. Step 6: Final answer
    x = 23,187.43

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1.5x scale

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.