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Finding the Fourth Proportional to 9,990.64, 14,986.02 and 4,442.68

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Solution

The fourth proportional to 9,990.64, 14,986.02 and 4,442.68 is: 6,664.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.64 : 14,986.02 = 4,442.68 : x
  2. Step 2: Convert to fraction form
    9,990.64/14,986.02 = 4,442.68/x
  3. Step 3: Cross multiply
    9,990.64x = 14,986.02 × 4,442.68
  4. Step 4: Simplify right side
    9,990.64x = 66,578,091.33
  5. Step 5: Solve for x
    x = 66,578,091.33/9,990.64
  6. Step 6: Final answer
    x = 6,664.05

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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.