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Finding the Fourth Proportional to 19,338.48, 28,978.56 and 14,384.88

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Solution

The fourth proportional to 19,338.48, 28,978.56 and 14,384.88 is: 21,555.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,338.48 : 28,978.56 = 14,384.88 : x
  2. Step 2: Convert to fraction form
    19,338.48/28,978.56 = 14,384.88/x
  3. Step 3: Cross multiply
    19,338.48x = 28,978.56 × 14,384.88
  4. Step 4: Simplify right side
    19,338.48x = 416,853,108.17
  5. Step 5: Solve for x
    x = 416,853,108.17/19,338.48
  6. Step 6: Final answer
    x = 21,555.63

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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.