Home / 19,690.85-27,172.71-11,728.95

Finding the Fourth Proportional to 19,690.85, 27,172.71 and 11,728.95

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Solution

The fourth proportional to 19,690.85, 27,172.71 and 11,728.95 is: 16,185.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,690.85 : 27,172.71 = 11,728.95 : x
  2. Step 2: Convert to fraction form
    19,690.85/27,172.71 = 11,728.95/x
  3. Step 3: Cross multiply
    19,690.85x = 27,172.71 × 11,728.95
  4. Step 4: Simplify right side
    19,690.85x = 318,707,356.95
  5. Step 5: Solve for x
    x = 318,707,356.95/19,690.85
  6. Step 6: Final answer
    x = 16,185.56

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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.