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Finding the Fourth Proportional to 14,418.00, 21,630.50 and 7,020.78

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Solution

The fourth proportional to 14,418.00, 21,630.50 and 7,020.78 is: 10,532.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,418.00 : 21,630.50 = 7,020.78 : x
  2. Step 2: Convert to fraction form
    14,418.00/21,630.50 = 7,020.78/x
  3. Step 3: Cross multiply
    14,418.00x = 21,630.50 × 7,020.78
  4. Step 4: Simplify right side
    14,418.00x = 151,862,973.01
  5. Step 5: Solve for x
    x = 151,862,973.01/14,418.00
  6. Step 6: Final answer
    x = 10,532.87

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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.