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Finding the Fourth Proportional to 13,803.95, 20,702.45 and 3,943.28

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Solution

The fourth proportional to 13,803.95, 20,702.45 and 3,943.28 is: 5,913.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,803.95 : 20,702.45 = 3,943.28 : x
  2. Step 2: Convert to fraction form
    13,803.95/20,702.45 = 3,943.28/x
  3. Step 3: Cross multiply
    13,803.95x = 20,702.45 × 3,943.28
  4. Step 4: Simplify right side
    13,803.95x = 81,635,618.65
  5. Step 5: Solve for x
    x = 81,635,618.65/13,803.95
  6. Step 6: Final answer
    x = 5,913.93

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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.