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Finding the Fourth Proportional to 14,670, 21,990.42 and 6,864.84

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Solution

The fourth proportional to 14,670, 21,990.42 and 6,864.84 is: 10,290.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,670 : 21,990.42 = 6,864.84 : x
  2. Step 2: Convert to fraction form
    14,670/21,990.42 = 6,864.84/x
  3. Step 3: Cross multiply
    14,670x = 21,990.42 × 6,864.84
  4. Step 4: Simplify right side
    14,670x = 150,960,714.83
  5. Step 5: Solve for x
    x = 150,960,714.83/14,670
  6. Step 6: Final answer
    x = 10,290.44

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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.