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Finding the Fourth Proportional to 30,663.36, 45,999.90 and 9,882

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Solution

The fourth proportional to 30,663.36, 45,999.90 and 9,882 is: 14,824.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,663.36 : 45,999.90 = 9,882 : x
  2. Step 2: Convert to fraction form
    30,663.36/45,999.90 = 9,882/x
  3. Step 3: Cross multiply
    30,663.36x = 45,999.90 × 9,882
  4. Step 4: Simplify right side
    30,663.36x = 454,571,011.80
  5. Step 5: Solve for x
    x = 454,571,011.80/30,663.36
  6. Step 6: Final answer
    x = 14,824.57

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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.