Home / 8,420.25-11,619.84-4,643.55

Finding the Fourth Proportional to 8,420.25, 11,619.84 and 4,643.55

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Solution

The fourth proportional to 8,420.25, 11,619.84 and 4,643.55 is: 6,408.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.25 : 11,619.84 = 4,643.55 : x
  2. Step 2: Convert to fraction form
    8,420.25/11,619.84 = 4,643.55/x
  3. Step 3: Cross multiply
    8,420.25x = 11,619.84 × 4,643.55
  4. Step 4: Simplify right side
    8,420.25x = 53,957,308.03
  5. Step 5: Solve for x
    x = 53,957,308.03/8,420.25
  6. Step 6: Final answer
    x = 6,408.04

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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.