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Finding the Fourth Proportional to 18,620.30, 27,930.45 and 6,931.10

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Solution

The fourth proportional to 18,620.30, 27,930.45 and 6,931.10 is: 10,396.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,620.30 : 27,930.45 = 6,931.10 : x
  2. Step 2: Convert to fraction form
    18,620.30/27,930.45 = 6,931.10/x
  3. Step 3: Cross multiply
    18,620.30x = 27,930.45 × 6,931.10
  4. Step 4: Simplify right side
    18,620.30x = 193,588,742.00
  5. Step 5: Solve for x
    x = 193,588,742.00/18,620.30
  6. Step 6: Final answer
    x = 10,396.65

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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.