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Finding the Fourth Proportional to 9,429.36, 12,999 and 6,626.16

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Solution

The fourth proportional to 9,429.36, 12,999 and 6,626.16 is: 9,134.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,429.36 : 12,999 = 6,626.16 : x
  2. Step 2: Convert to fraction form
    9,429.36/12,999 = 6,626.16/x
  3. Step 3: Cross multiply
    9,429.36x = 12,999 × 6,626.16
  4. Step 4: Simplify right side
    9,429.36x = 86,133,453.84
  5. Step 5: Solve for x
    x = 86,133,453.84/9,429.36
  6. Step 6: Final answer
    x = 9,134.60

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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.