Home / 8,391.40-12,582.20-3,455.12

Finding the Fourth Proportional to 8,391.40, 12,582.20 and 3,455.12

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Solution

The fourth proportional to 8,391.40, 12,582.20 and 3,455.12 is: 5,180.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.40 : 12,582.20 = 3,455.12 : x
  2. Step 2: Convert to fraction form
    8,391.40/12,582.20 = 3,455.12/x
  3. Step 3: Cross multiply
    8,391.40x = 12,582.20 × 3,455.12
  4. Step 4: Simplify right side
    8,391.40x = 43,473,050.96
  5. Step 5: Solve for x
    x = 43,473,050.96/8,391.40
  6. Step 6: Final answer
    x = 5,180.67

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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.