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Finding the Fourth Proportional to 9,317.56, 12,855.09 and 6,328.21

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Solution

The fourth proportional to 9,317.56, 12,855.09 and 6,328.21 is: 8,730.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,317.56 : 12,855.09 = 6,328.21 : x
  2. Step 2: Convert to fraction form
    9,317.56/12,855.09 = 6,328.21/x
  3. Step 3: Cross multiply
    9,317.56x = 12,855.09 × 6,328.21
  4. Step 4: Simplify right side
    9,317.56x = 81,349,709.09
  5. Step 5: Solve for x
    x = 81,349,709.09/9,317.56
  6. Step 6: Final answer
    x = 8,730.80

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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.