Home / 20,455.16-30,679.31-5,665.58

Finding the Fourth Proportional to 20,455.16, 30,679.31 and 5,665.58

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Solution

The fourth proportional to 20,455.16, 30,679.31 and 5,665.58 is: 8,497.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.16 : 30,679.31 = 5,665.58 : x
  2. Step 2: Convert to fraction form
    20,455.16/30,679.31 = 5,665.58/x
  3. Step 3: Cross multiply
    20,455.16x = 30,679.31 × 5,665.58
  4. Step 4: Simplify right side
    20,455.16x = 173,815,903.43
  5. Step 5: Solve for x
    x = 173,815,903.43/20,455.16
  6. Step 6: Final answer
    x = 8,497.41

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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.