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Finding the Fourth Proportional to 30,490.72, 45,737.88 and 11,770.88

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Solution

The fourth proportional to 30,490.72, 45,737.88 and 11,770.88 is: 17,657.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,490.72 : 45,737.88 = 11,770.88 : x
  2. Step 2: Convert to fraction form
    30,490.72/45,737.88 = 11,770.88/x
  3. Step 3: Cross multiply
    30,490.72x = 45,737.88 × 11,770.88
  4. Step 4: Simplify right side
    30,490.72x = 538,375,096.93
  5. Step 5: Solve for x
    x = 538,375,096.93/30,490.72
  6. Step 6: Final answer
    x = 17,657.01

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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.