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Finding the Fourth Proportional to 15,745.49, 21,726.92 and 8,939.06

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Solution

The fourth proportional to 15,745.49, 21,726.92 and 8,939.06 is: 12,334.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,745.49 : 21,726.92 = 8,939.06 : x
  2. Step 2: Convert to fraction form
    15,745.49/21,726.92 = 8,939.06/x
  3. Step 3: Cross multiply
    15,745.49x = 21,726.92 × 8,939.06
  4. Step 4: Simplify right side
    15,745.49x = 194,218,155.21
  5. Step 5: Solve for x
    x = 194,218,155.21/15,745.49
  6. Step 6: Final answer
    x = 12,334.85

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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.