Home / 20,758.10-31,137.15-20,563.70

Finding the Fourth Proportional to 20,758.10, 31,137.15 and 20,563.70

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Solution

The fourth proportional to 20,758.10, 31,137.15 and 20,563.70 is: 30,845.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.10 : 31,137.15 = 20,563.70 : x
  2. Step 2: Convert to fraction form
    20,758.10/31,137.15 = 20,563.70/x
  3. Step 3: Cross multiply
    20,758.10x = 31,137.15 × 20,563.70
  4. Step 4: Simplify right side
    20,758.10x = 640,295,011.46
  5. Step 5: Solve for x
    x = 640,295,011.46/20,758.10
  6. Step 6: Final answer
    x = 30,845.55

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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.