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Finding the Fourth Proportional to 14,490.80, 21,730.80 and 5,723.90

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Solution

The fourth proportional to 14,490.80, 21,730.80 and 5,723.90 is: 8,583.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,490.80 : 21,730.80 = 5,723.90 : x
  2. Step 2: Convert to fraction form
    14,490.80/21,730.80 = 5,723.90/x
  3. Step 3: Cross multiply
    14,490.80x = 21,730.80 × 5,723.90
  4. Step 4: Simplify right side
    14,490.80x = 124,384,926.12
  5. Step 5: Solve for x
    x = 124,384,926.12/14,490.80
  6. Step 6: Final answer
    x = 8,583.72

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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.