Home / 19,856.40-27,399.78-11,898.42

Finding the Fourth Proportional to 19,856.40, 27,399.78 and 11,898.42

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Solution

The fourth proportional to 19,856.40, 27,399.78 and 11,898.42 is: 16,418.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,856.40 : 27,399.78 = 11,898.42 : x
  2. Step 2: Convert to fraction form
    19,856.40/27,399.78 = 11,898.42/x
  3. Step 3: Cross multiply
    19,856.40x = 27,399.78 × 11,898.42
  4. Step 4: Simplify right side
    19,856.40x = 326,014,090.35
  5. Step 5: Solve for x
    x = 326,014,090.35/19,856.40
  6. Step 6: Final answer
    x = 16,418.59

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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.