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Finding the Fourth Proportional to 19,980.74, 29,976.73 and 8,737.07

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Solution

The fourth proportional to 19,980.74, 29,976.73 and 8,737.07 is: 13,108.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.74 : 29,976.73 = 8,737.07 : x
  2. Step 2: Convert to fraction form
    19,980.74/29,976.73 = 8,737.07/x
  3. Step 3: Cross multiply
    19,980.74x = 29,976.73 × 8,737.07
  4. Step 4: Simplify right side
    19,980.74x = 261,908,616.65
  5. Step 5: Solve for x
    x = 261,908,616.65/19,980.74
  6. Step 6: Final answer
    x = 13,108.05

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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.