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Finding the Fourth Proportional to 15,895.94, 21,940.38 and 9,185.47

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Solution

The fourth proportional to 15,895.94, 21,940.38 and 9,185.47 is: 12,678.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,895.94 : 21,940.38 = 9,185.47 : x
  2. Step 2: Convert to fraction form
    15,895.94/21,940.38 = 9,185.47/x
  3. Step 3: Cross multiply
    15,895.94x = 21,940.38 × 9,185.47
  4. Step 4: Simplify right side
    15,895.94x = 201,532,647.43
  5. Step 5: Solve for x
    x = 201,532,647.43/15,895.94
  6. Step 6: Final answer
    x = 12,678.25

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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.