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Finding the Fourth Proportional to 15,517, 21,413.28 and 8,443.30

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Solution

The fourth proportional to 15,517, 21,413.28 and 8,443.30 is: 11,651.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,517 : 21,413.28 = 8,443.30 : x
  2. Step 2: Convert to fraction form
    15,517/21,413.28 = 8,443.30/x
  3. Step 3: Cross multiply
    15,517x = 21,413.28 × 8,443.30
  4. Step 4: Simplify right side
    15,517x = 180,798,747.02
  5. Step 5: Solve for x
    x = 180,798,747.02/15,517
  6. Step 6: Final answer
    x = 11,651.66

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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.