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Finding the Fourth Proportional to 19,195.78, 26,491.80 and 10,813.90

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Solution

The fourth proportional to 19,195.78, 26,491.80 and 10,813.90 is: 14,924.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,195.78 : 26,491.80 = 10,813.90 : x
  2. Step 2: Convert to fraction form
    19,195.78/26,491.80 = 10,813.90/x
  3. Step 3: Cross multiply
    19,195.78x = 26,491.80 × 10,813.90
  4. Step 4: Simplify right side
    19,195.78x = 286,479,676.02
  5. Step 5: Solve for x
    x = 286,479,676.02/19,195.78
  6. Step 6: Final answer
    x = 14,924.10

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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.