Home / 38,205.30-57,307.68-20,785.86

Finding the Fourth Proportional to 38,205.30, 57,307.68 and 20,785.86

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Solution

The fourth proportional to 38,205.30, 57,307.68 and 20,785.86 is: 31,178.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,205.30 : 57,307.68 = 20,785.86 : x
  2. Step 2: Convert to fraction form
    38,205.30/57,307.68 = 20,785.86/x
  3. Step 3: Cross multiply
    38,205.30x = 57,307.68 × 20,785.86
  4. Step 4: Simplify right side
    38,205.30x = 1,191,189,413.40
  5. Step 5: Solve for x
    x = 1,191,189,413.40/38,205.30
  6. Step 6: Final answer
    x = 31,178.64

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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.