Home / 27,987.78-38,594.11-21,615.41

Finding the Fourth Proportional to 27,987.78, 38,594.11 and 21,615.41

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Solution

The fourth proportional to 27,987.78, 38,594.11 and 21,615.41 is: 29,806.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,987.78 : 38,594.11 = 21,615.41 : x
  2. Step 2: Convert to fraction form
    27,987.78/38,594.11 = 21,615.41/x
  3. Step 3: Cross multiply
    27,987.78x = 38,594.11 × 21,615.41
  4. Step 4: Simplify right side
    27,987.78x = 834,227,511.24
  5. Step 5: Solve for x
    x = 834,227,511.24/27,987.78
  6. Step 6: Final answer
    x = 29,806.85

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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.