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Finding the Fourth Proportional to 18,654, 27,981.12 and 6,972.72

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Solution

The fourth proportional to 18,654, 27,981.12 and 6,972.72 is: 10,459.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,654 : 27,981.12 = 6,972.72 : x
  2. Step 2: Convert to fraction form
    18,654/27,981.12 = 6,972.72/x
  3. Step 3: Cross multiply
    18,654x = 27,981.12 × 6,972.72
  4. Step 4: Simplify right side
    18,654x = 195,104,515.05
  5. Step 5: Solve for x
    x = 195,104,515.05/18,654
  6. Step 6: Final answer
    x = 10,459.12

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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.