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Finding the Fourth Proportional to 6,618.71, 9,916.22 and 4,420.78

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Solution

The fourth proportional to 6,618.71, 9,916.22 and 4,420.78 is: 6,623.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,618.71 : 9,916.22 = 4,420.78 : x
  2. Step 2: Convert to fraction form
    6,618.71/9,916.22 = 4,420.78/x
  3. Step 3: Cross multiply
    6,618.71x = 9,916.22 × 4,420.78
  4. Step 4: Simplify right side
    6,618.71x = 43,837,413.31
  5. Step 5: Solve for x
    x = 43,837,413.31/6,618.71
  6. Step 6: Final answer
    x = 6,623.25

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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.