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Finding the Fourth Proportional to 27,883.70, 38,479.54 and 15,136.88

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Solution

The fourth proportional to 27,883.70, 38,479.54 and 15,136.88 is: 20,888.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,883.70 : 38,479.54 = 15,136.88 : x
  2. Step 2: Convert to fraction form
    27,883.70/38,479.54 = 15,136.88/x
  3. Step 3: Cross multiply
    27,883.70x = 38,479.54 × 15,136.88
  4. Step 4: Simplify right side
    27,883.70x = 582,460,179.44
  5. Step 5: Solve for x
    x = 582,460,179.44/27,883.70
  6. Step 6: Final answer
    x = 20,888.91

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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.