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Finding the Fourth Proportional to 9,376.75, 12,940.32 and 5,185

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Solution

The fourth proportional to 9,376.75, 12,940.32 and 5,185 is: 7,155.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,376.75 : 12,940.32 = 5,185 : x
  2. Step 2: Convert to fraction form
    9,376.75/12,940.32 = 5,185/x
  3. Step 3: Cross multiply
    9,376.75x = 12,940.32 × 5,185
  4. Step 4: Simplify right side
    9,376.75x = 67,095,559.20
  5. Step 5: Solve for x
    x = 67,095,559.20/9,376.75
  6. Step 6: Final answer
    x = 7,155.52

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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.