Home / 20,516.90-30,735.17-18,285.40

Finding the Fourth Proportional to 20,516.90, 30,735.17 and 18,285.40

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Solution

The fourth proportional to 20,516.90, 30,735.17 and 18,285.40 is: 27,392.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.90 : 30,735.17 = 18,285.40 : x
  2. Step 2: Convert to fraction form
    20,516.90/30,735.17 = 18,285.40/x
  3. Step 3: Cross multiply
    20,516.90x = 30,735.17 × 18,285.40
  4. Step 4: Simplify right side
    20,516.90x = 562,004,771.62
  5. Step 5: Solve for x
    x = 562,004,771.62/20,516.90
  6. Step 6: Final answer
    x = 27,392.29

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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.