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Finding the Fourth Proportional to 15,895.69, 21,940.03 and 9,185.21

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Solution

The fourth proportional to 15,895.69, 21,940.03 and 9,185.21 is: 12,677.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,895.69 : 21,940.03 = 9,185.21 : x
  2. Step 2: Convert to fraction form
    15,895.69/21,940.03 = 9,185.21/x
  3. Step 3: Cross multiply
    15,895.69x = 21,940.03 × 9,185.21
  4. Step 4: Simplify right side
    15,895.69x = 201,523,782.96
  5. Step 5: Solve for x
    x = 201,523,782.96/15,895.69
  6. Step 6: Final answer
    x = 12,677.89

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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.