Home / 8,420.56-11,620.09-4,643.79

Finding the Fourth Proportional to 8,420.56, 11,620.09 and 4,643.79

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Solution

The fourth proportional to 8,420.56, 11,620.09 and 4,643.79 is: 6,408.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.56 : 11,620.09 = 4,643.79 : x
  2. Step 2: Convert to fraction form
    8,420.56/11,620.09 = 4,643.79/x
  3. Step 3: Cross multiply
    8,420.56x = 11,620.09 × 4,643.79
  4. Step 4: Simplify right side
    8,420.56x = 53,961,252.65
  5. Step 5: Solve for x
    x = 53,961,252.65/8,420.56
  6. Step 6: Final answer
    x = 6,408.28

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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.