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Finding the Fourth Proportional to 9,891.90, 14,837.88 and 3,318.12

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Solution

The fourth proportional to 9,891.90, 14,837.88 and 3,318.12 is: 4,977.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,891.90 : 14,837.88 = 3,318.12 : x
  2. Step 2: Convert to fraction form
    9,891.90/14,837.88 = 3,318.12/x
  3. Step 3: Cross multiply
    9,891.90x = 14,837.88 × 3,318.12
  4. Step 4: Simplify right side
    9,891.90x = 49,233,866.39
  5. Step 5: Solve for x
    x = 49,233,866.39/9,891.90
  6. Step 6: Final answer
    x = 4,977.19

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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.