Home / 20,648.78-30,814.92-18,434.42

Finding the Fourth Proportional to 20,648.78, 30,814.92 and 18,434.42

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Solution

The fourth proportional to 20,648.78, 30,814.92 and 18,434.42 is: 27,510.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.78 : 30,814.92 = 18,434.42 : x
  2. Step 2: Convert to fraction form
    20,648.78/30,814.92 = 18,434.42/x
  3. Step 3: Cross multiply
    20,648.78x = 30,814.92 × 18,434.42
  4. Step 4: Simplify right side
    20,648.78x = 568,055,177.55
  5. Step 5: Solve for x
    x = 568,055,177.55/20,648.78
  6. Step 6: Final answer
    x = 27,510.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.