Home / 21,724.65-29,987.16-12,771.72

Finding the Fourth Proportional to 21,724.65, 29,987.16 and 12,771.72

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Solution

The fourth proportional to 21,724.65, 29,987.16 and 12,771.72 is: 17,629.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,724.65 : 29,987.16 = 12,771.72 : x
  2. Step 2: Convert to fraction form
    21,724.65/29,987.16 = 12,771.72/x
  3. Step 3: Cross multiply
    21,724.65x = 29,987.16 × 12,771.72
  4. Step 4: Simplify right side
    21,724.65x = 382,987,611.12
  5. Step 5: Solve for x
    x = 382,987,611.12/21,724.65
  6. Step 6: Final answer
    x = 17,629.17

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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.