Home / 20,155.34-30,237.78-19,820.64

Finding the Fourth Proportional to 20,155.34, 30,237.78 and 19,820.64

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Solution

The fourth proportional to 20,155.34, 30,237.78 and 19,820.64 is: 29,735.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.34 : 30,237.78 = 19,820.64 : x
  2. Step 2: Convert to fraction form
    20,155.34/30,237.78 = 19,820.64/x
  3. Step 3: Cross multiply
    20,155.34x = 30,237.78 × 19,820.64
  4. Step 4: Simplify right side
    20,155.34x = 599,332,151.78
  5. Step 5: Solve for x
    x = 599,332,151.78/20,155.34
  6. Step 6: Final answer
    x = 29,735.65

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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.