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Finding the Fourth Proportional to 25,897.90, 38,846.85 and 8,131.30

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Solution

The fourth proportional to 25,897.90, 38,846.85 and 8,131.30 is: 12,196.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,897.90 : 38,846.85 = 8,131.30 : x
  2. Step 2: Convert to fraction form
    25,897.90/38,846.85 = 8,131.30/x
  3. Step 3: Cross multiply
    25,897.90x = 38,846.85 × 8,131.30
  4. Step 4: Simplify right side
    25,897.90x = 315,875,391.41
  5. Step 5: Solve for x
    x = 315,875,391.41/25,897.90
  6. Step 6: Final answer
    x = 12,196.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.