Home / 25,645.20-38,467.80-8,120.40

Finding the Fourth Proportional to 25,645.20, 38,467.80 and 8,120.40

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Solution

The fourth proportional to 25,645.20, 38,467.80 and 8,120.40 is: 12,180.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,645.20 : 38,467.80 = 8,120.40 : x
  2. Step 2: Convert to fraction form
    25,645.20/38,467.80 = 8,120.40/x
  3. Step 3: Cross multiply
    25,645.20x = 38,467.80 × 8,120.40
  4. Step 4: Simplify right side
    25,645.20x = 312,373,923.12
  5. Step 5: Solve for x
    x = 312,373,923.12/25,645.20
  6. Step 6: Final answer
    x = 12,180.60

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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.