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Finding the Fourth Proportional to 9,318.90, 12,849.31 and 7,429.01

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Solution

The fourth proportional to 9,318.90, 12,849.31 and 7,429.01 is: 10,243.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,318.90 : 12,849.31 = 7,429.01 : x
  2. Step 2: Convert to fraction form
    9,318.90/12,849.31 = 7,429.01/x
  3. Step 3: Cross multiply
    9,318.90x = 12,849.31 × 7,429.01
  4. Step 4: Simplify right side
    9,318.90x = 95,457,629.65
  5. Step 5: Solve for x
    x = 95,457,629.65/9,318.90
  6. Step 6: Final answer
    x = 10,243.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.