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Finding the Fourth Proportional to 20,601.40, 30,903.12 and 10,759.90

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Solution

The fourth proportional to 20,601.40, 30,903.12 and 10,759.90 is: 16,140.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,601.40 : 30,903.12 = 10,759.90 : x
  2. Step 2: Convert to fraction form
    20,601.40/30,903.12 = 10,759.90/x
  3. Step 3: Cross multiply
    20,601.40x = 30,903.12 × 10,759.90
  4. Step 4: Simplify right side
    20,601.40x = 332,514,427.09
  5. Step 5: Solve for x
    x = 332,514,427.09/20,601.40
  6. Step 6: Final answer
    x = 16,140.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.