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Finding the Fourth Proportional to 25,830.60, 38,745.90 and 8,302.20

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Solution

The fourth proportional to 25,830.60, 38,745.90 and 8,302.20 is: 12,453.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,830.60 : 38,745.90 = 8,302.20 : x
  2. Step 2: Convert to fraction form
    25,830.60/38,745.90 = 8,302.20/x
  3. Step 3: Cross multiply
    25,830.60x = 38,745.90 × 8,302.20
  4. Step 4: Simplify right side
    25,830.60x = 321,676,210.98
  5. Step 5: Solve for x
    x = 321,676,210.98/25,830.60
  6. Step 6: Final answer
    x = 12,453.30

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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.