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Finding the Fourth Proportional to 18,646.76, 27,981.09 and 6,960.89

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Solution

The fourth proportional to 18,646.76, 27,981.09 and 6,960.89 is: 10,445.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,646.76 : 27,981.09 = 6,960.89 : x
  2. Step 2: Convert to fraction form
    18,646.76/27,981.09 = 6,960.89/x
  3. Step 3: Cross multiply
    18,646.76x = 27,981.09 × 6,960.89
  4. Step 4: Simplify right side
    18,646.76x = 194,773,289.57
  5. Step 5: Solve for x
    x = 194,773,289.57/18,646.76
  6. Step 6: Final answer
    x = 10,445.42

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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.