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Finding the Fourth Proportional to 30,389.40, 45,551.70 and 11,662.20

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Solution

The fourth proportional to 30,389.40, 45,551.70 and 11,662.20 is: 17,480.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,389.40 : 45,551.70 = 11,662.20 : x
  2. Step 2: Convert to fraction form
    30,389.40/45,551.70 = 11,662.20/x
  3. Step 3: Cross multiply
    30,389.40x = 45,551.70 × 11,662.20
  4. Step 4: Simplify right side
    30,389.40x = 531,233,035.74
  5. Step 5: Solve for x
    x = 531,233,035.74/30,389.40
  6. Step 6: Final answer
    x = 17,480.87

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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.