Home / 45,406.40-68,109.60-20,455.16

Finding the Fourth Proportional to 45,406.40, 68,109.60 and 20,455.16

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Solution

The fourth proportional to 45,406.40, 68,109.60 and 20,455.16 is: 30,682.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,406.40 : 68,109.60 = 20,455.16 : x
  2. Step 2: Convert to fraction form
    45,406.40/68,109.60 = 20,455.16/x
  3. Step 3: Cross multiply
    45,406.40x = 68,109.60 × 20,455.16
  4. Step 4: Simplify right side
    45,406.40x = 1,393,192,765.54
  5. Step 5: Solve for x
    x = 1,393,192,765.54/45,406.40
  6. Step 6: Final answer
    x = 30,682.74

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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.