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Finding the Fourth Proportional to 14,485.62, 21,721.08 and 7,078.98

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Solution

The fourth proportional to 14,485.62, 21,721.08 and 7,078.98 is: 10,614.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,485.62 : 21,721.08 = 7,078.98 : x
  2. Step 2: Convert to fraction form
    14,485.62/21,721.08 = 7,078.98/x
  3. Step 3: Cross multiply
    14,485.62x = 21,721.08 × 7,078.98
  4. Step 4: Simplify right side
    14,485.62x = 153,763,090.90
  5. Step 5: Solve for x
    x = 153,763,090.90/14,485.62
  6. Step 6: Final answer
    x = 10,614.88

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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.