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Finding the Fourth Proportional to 14,957.16, 20,640 and 8,669.40

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Solution

The fourth proportional to 14,957.16, 20,640 and 8,669.40 is: 11,963.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,957.16 : 20,640 = 8,669.40 : x
  2. Step 2: Convert to fraction form
    14,957.16/20,640 = 8,669.40/x
  3. Step 3: Cross multiply
    14,957.16x = 20,640 × 8,669.40
  4. Step 4: Simplify right side
    14,957.16x = 178,936,416
  5. Step 5: Solve for x
    x = 178,936,416/14,957.16
  6. Step 6: Final answer
    x = 11,963.26

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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.