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Finding the Fourth Proportional to 14,394.78, 19,879.02 and 9,930.06

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Solution

The fourth proportional to 14,394.78, 19,879.02 and 9,930.06 is: 13,713.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,394.78 : 19,879.02 = 9,930.06 : x
  2. Step 2: Convert to fraction form
    14,394.78/19,879.02 = 9,930.06/x
  3. Step 3: Cross multiply
    14,394.78x = 19,879.02 × 9,930.06
  4. Step 4: Simplify right side
    14,394.78x = 197,399,861.34
  5. Step 5: Solve for x
    x = 197,399,861.34/14,394.78
  6. Step 6: Final answer
    x = 13,713.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.