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Finding the Fourth Proportional to 28,982.99, 43,479.36 and 8,987.87

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Solution

The fourth proportional to 28,982.99, 43,479.36 and 8,987.87 is: 13,483.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,982.99 : 43,479.36 = 8,987.87 : x
  2. Step 2: Convert to fraction form
    28,982.99/43,479.36 = 8,987.87/x
  3. Step 3: Cross multiply
    28,982.99x = 43,479.36 × 8,987.87
  4. Step 4: Simplify right side
    28,982.99x = 390,786,617.97
  5. Step 5: Solve for x
    x = 390,786,617.97/28,982.99
  6. Step 6: Final answer
    x = 13,483.31

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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.