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Finding the Fourth Proportional to 19,313.95, 28,963.63 and 8,918.41

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Solution

The fourth proportional to 19,313.95, 28,963.63 and 8,918.41 is: 13,374.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,313.95 : 28,963.63 = 8,918.41 : x
  2. Step 2: Convert to fraction form
    19,313.95/28,963.63 = 8,918.41/x
  3. Step 3: Cross multiply
    19,313.95x = 28,963.63 × 8,918.41
  4. Step 4: Simplify right side
    19,313.95x = 258,309,527.43
  5. Step 5: Solve for x
    x = 258,309,527.43/19,313.95
  6. Step 6: Final answer
    x = 13,374.25

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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.