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Finding the Fourth Proportional to 20,328.39, 30,496 and 7,000.85

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Solution

The fourth proportional to 20,328.39, 30,496 and 7,000.85 is: 10,502.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,328.39 : 30,496 = 7,000.85 : x
  2. Step 2: Convert to fraction form
    20,328.39/30,496 = 7,000.85/x
  3. Step 3: Cross multiply
    20,328.39x = 30,496 × 7,000.85
  4. Step 4: Simplify right side
    20,328.39x = 213,497,921.60
  5. Step 5: Solve for x
    x = 213,497,921.60/20,328.39
  6. Step 6: Final answer
    x = 10,502.45

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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.