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Finding the Fourth Proportional to 19,289.25, 26,617.90 and 10,789.90

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Solution

The fourth proportional to 19,289.25, 26,617.90 and 10,789.90 is: 14,889.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,289.25 : 26,617.90 = 10,789.90 : x
  2. Step 2: Convert to fraction form
    19,289.25/26,617.90 = 10,789.90/x
  3. Step 3: Cross multiply
    19,289.25x = 26,617.90 × 10,789.90
  4. Step 4: Simplify right side
    19,289.25x = 287,204,479.21
  5. Step 5: Solve for x
    x = 287,204,479.21/19,289.25
  6. Step 6: Final answer
    x = 14,889.35

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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.