Home / 8,421.87-11,622.27-4,645.20

Finding the Fourth Proportional to 8,421.87, 11,622.27 and 4,645.20

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Solution

The fourth proportional to 8,421.87, 11,622.27 and 4,645.20 is: 6,410.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.87 : 11,622.27 = 4,645.20 : x
  2. Step 2: Convert to fraction form
    8,421.87/11,622.27 = 4,645.20/x
  3. Step 3: Cross multiply
    8,421.87x = 11,622.27 × 4,645.20
  4. Step 4: Simplify right side
    8,421.87x = 53,987,768.60
  5. Step 5: Solve for x
    x = 53,987,768.60/8,421.87
  6. Step 6: Final answer
    x = 6,410.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.