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Finding the Fourth Proportional to 28,651.36, 42,983.16 and 8,929.48

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Solution

The fourth proportional to 28,651.36, 42,983.16 and 8,929.48 is: 13,396.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,651.36 : 42,983.16 = 8,929.48 : x
  2. Step 2: Convert to fraction form
    28,651.36/42,983.16 = 8,929.48/x
  3. Step 3: Cross multiply
    28,651.36x = 42,983.16 × 8,929.48
  4. Step 4: Simplify right side
    28,651.36x = 383,817,267.56
  5. Step 5: Solve for x
    x = 383,817,267.56/28,651.36
  6. Step 6: Final answer
    x = 13,396.13

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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.