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Finding the Fourth Proportional to 9,933.40, 14,901.90 and 4,990.60

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Solution

The fourth proportional to 9,933.40, 14,901.90 and 4,990.60 is: 7,486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,933.40 : 14,901.90 = 4,990.60 : x
  2. Step 2: Convert to fraction form
    9,933.40/14,901.90 = 4,990.60/x
  3. Step 3: Cross multiply
    9,933.40x = 14,901.90 × 4,990.60
  4. Step 4: Simplify right side
    9,933.40x = 74,369,422.14
  5. Step 5: Solve for x
    x = 74,369,422.14/9,933.40
  6. Step 6: Final answer
    x = 7,486.80

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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.