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Finding the Fourth Proportional to 30,369.40, 45,521.70 and 11,642.20

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Solution

The fourth proportional to 30,369.40, 45,521.70 and 11,642.20 is: 17,450.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,369.40 : 45,521.70 = 11,642.20 : x
  2. Step 2: Convert to fraction form
    30,369.40/45,521.70 = 11,642.20/x
  3. Step 3: Cross multiply
    30,369.40x = 45,521.70 × 11,642.20
  4. Step 4: Simplify right side
    30,369.40x = 529,972,735.74
  5. Step 5: Solve for x
    x = 529,972,735.74/30,369.40
  6. Step 6: Final answer
    x = 17,450.88

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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.