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Finding the Fourth Proportional to 20,618.67, 30,931.05 and 7,467.98

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Solution

The fourth proportional to 20,618.67, 30,931.05 and 7,467.98 is: 11,203.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.67 : 30,931.05 = 7,467.98 : x
  2. Step 2: Convert to fraction form
    20,618.67/30,931.05 = 7,467.98/x
  3. Step 3: Cross multiply
    20,618.67x = 30,931.05 × 7,467.98
  4. Step 4: Simplify right side
    20,618.67x = 230,992,308.12
  5. Step 5: Solve for x
    x = 230,992,308.12/20,618.67
  6. Step 6: Final answer
    x = 11,203.07

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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.