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Finding the Fourth Proportional to 19,890.30, 29,848.86 and 8,203.26

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Solution

The fourth proportional to 19,890.30, 29,848.86 and 8,203.26 is: 12,310.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.30 : 29,848.86 = 8,203.26 : x
  2. Step 2: Convert to fraction form
    19,890.30/29,848.86 = 8,203.26/x
  3. Step 3: Cross multiply
    19,890.30x = 29,848.86 × 8,203.26
  4. Step 4: Simplify right side
    19,890.30x = 244,857,959.28
  5. Step 5: Solve for x
    x = 244,857,959.28/19,890.30
  6. Step 6: Final answer
    x = 12,310.42

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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.