Home / 8,420.67-11,620.59-4,643.99

Finding the Fourth Proportional to 8,420.67, 11,620.59 and 4,643.99

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Solution

The fourth proportional to 8,420.67, 11,620.59 and 4,643.99 is: 6,408.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.67 : 11,620.59 = 4,643.99 : x
  2. Step 2: Convert to fraction form
    8,420.67/11,620.59 = 4,643.99/x
  3. Step 3: Cross multiply
    8,420.67x = 11,620.59 × 4,643.99
  4. Step 4: Simplify right side
    8,420.67x = 53,965,845.65
  5. Step 5: Solve for x
    x = 53,965,845.65/8,420.67
  6. Step 6: Final answer
    x = 6,408.74

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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.