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Finding the Fourth Proportional to 13,963.08, 20,916.94 and 8,417.88

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Solution

The fourth proportional to 13,963.08, 20,916.94 and 8,417.88 is: 12,610.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,963.08 : 20,916.94 = 8,417.88 : x
  2. Step 2: Convert to fraction form
    13,963.08/20,916.94 = 8,417.88/x
  3. Step 3: Cross multiply
    13,963.08x = 20,916.94 × 8,417.88
  4. Step 4: Simplify right side
    13,963.08x = 176,076,290.89
  5. Step 5: Solve for x
    x = 176,076,290.89/13,963.08
  6. Step 6: Final answer
    x = 12,610.13

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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.