Home / 8,615.89-12,923.88-3,421.77

Finding the Fourth Proportional to 8,615.89, 12,923.88 and 3,421.77

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Solution

The fourth proportional to 8,615.89, 12,923.88 and 3,421.77 is: 5,132.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.89 : 12,923.88 = 3,421.77 : x
  2. Step 2: Convert to fraction form
    8,615.89/12,923.88 = 3,421.77/x
  3. Step 3: Cross multiply
    8,615.89x = 12,923.88 × 3,421.77
  4. Step 4: Simplify right side
    8,615.89x = 44,222,544.87
  5. Step 5: Solve for x
    x = 44,222,544.87/8,615.89
  6. Step 6: Final answer
    x = 5,132.67

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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.