Home / 20,140.10-30,217.35-8,456.90

Finding the Fourth Proportional to 20,140.10, 30,217.35 and 8,456.90

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Solution

The fourth proportional to 20,140.10, 30,217.35 and 8,456.90 is: 12,688.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.10 : 30,217.35 = 8,456.90 : x
  2. Step 2: Convert to fraction form
    20,140.10/30,217.35 = 8,456.90/x
  3. Step 3: Cross multiply
    20,140.10x = 30,217.35 × 8,456.90
  4. Step 4: Simplify right side
    20,140.10x = 255,545,107.22
  5. Step 5: Solve for x
    x = 255,545,107.22/20,140.10
  6. Step 6: Final answer
    x = 12,688.37

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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.