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Finding the Fourth Proportional to 19,163.90, 26,445.90 and 10,780.40

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Solution

The fourth proportional to 19,163.90, 26,445.90 and 10,780.40 is: 14,876.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,163.90 : 26,445.90 = 10,780.40 : x
  2. Step 2: Convert to fraction form
    19,163.90/26,445.90 = 10,780.40/x
  3. Step 3: Cross multiply
    19,163.90x = 26,445.90 × 10,780.40
  4. Step 4: Simplify right side
    19,163.90x = 285,097,380.36
  5. Step 5: Solve for x
    x = 285,097,380.36/19,163.90
  6. Step 6: Final answer
    x = 14,876.79

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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.