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Finding the Fourth Proportional to 20,978.08, 31,467.13 and 14,384.27

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Solution

The fourth proportional to 20,978.08, 31,467.13 and 14,384.27 is: 21,576.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,978.08 : 31,467.13 = 14,384.27 : x
  2. Step 2: Convert to fraction form
    20,978.08/31,467.13 = 14,384.27/x
  3. Step 3: Cross multiply
    20,978.08x = 31,467.13 × 14,384.27
  4. Step 4: Simplify right side
    20,978.08x = 452,631,736.75
  5. Step 5: Solve for x
    x = 452,631,736.75/20,978.08
  6. Step 6: Final answer
    x = 21,576.42

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1.5x scale

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.