Home / 8,450.40-12,675.60-7,138.20

Finding the Fourth Proportional to 8,450.40, 12,675.60 and 7,138.20

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Solution

The fourth proportional to 8,450.40, 12,675.60 and 7,138.20 is: 10,707.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,450.40 : 12,675.60 = 7,138.20 : x
  2. Step 2: Convert to fraction form
    8,450.40/12,675.60 = 7,138.20/x
  3. Step 3: Cross multiply
    8,450.40x = 12,675.60 × 7,138.20
  4. Step 4: Simplify right side
    8,450.40x = 90,480,967.92
  5. Step 5: Solve for x
    x = 90,480,967.92/8,450.40
  6. Step 6: Final answer
    x = 10,707.30

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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.