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Finding the Fourth Proportional to 20,620.58, 30,934.71 and 9,519.93

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Solution

The fourth proportional to 20,620.58, 30,934.71 and 9,519.93 is: 14,281.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.58 : 30,934.71 = 9,519.93 : x
  2. Step 2: Convert to fraction form
    20,620.58/30,934.71 = 9,519.93/x
  3. Step 3: Cross multiply
    20,620.58x = 30,934.71 × 9,519.93
  4. Step 4: Simplify right side
    20,620.58x = 294,496,273.77
  5. Step 5: Solve for x
    x = 294,496,273.77/20,620.58
  6. Step 6: Final answer
    x = 14,281.67

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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.