Home / 27,889.49-38,487.78-15,142.79

Finding the Fourth Proportional to 27,889.49, 38,487.78 and 15,142.79

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Solution

The fourth proportional to 27,889.49, 38,487.78 and 15,142.79 is: 20,897.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,889.49 : 38,487.78 = 15,142.79 : x
  2. Step 2: Convert to fraction form
    27,889.49/38,487.78 = 15,142.79/x
  3. Step 3: Cross multiply
    27,889.49x = 38,487.78 × 15,142.79
  4. Step 4: Simplify right side
    27,889.49x = 582,812,466.33
  5. Step 5: Solve for x
    x = 582,812,466.33/27,889.49
  6. Step 6: Final answer
    x = 20,897.21

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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.