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Finding the Fourth Proportional to 14,714.65, 21,978.41 and 12,640.65

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Solution

The fourth proportional to 14,714.65, 21,978.41 and 12,640.65 is: 18,880.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,714.65 : 21,978.41 = 12,640.65 : x
  2. Step 2: Convert to fraction form
    14,714.65/21,978.41 = 12,640.65/x
  3. Step 3: Cross multiply
    14,714.65x = 21,978.41 × 12,640.65
  4. Step 4: Simplify right side
    14,714.65x = 277,821,388.37
  5. Step 5: Solve for x
    x = 277,821,388.37/14,714.65
  6. Step 6: Final answer
    x = 18,880.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.