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Finding the Fourth Proportional to 18,651.40, 27,968.90 and 9,884.30

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Solution

The fourth proportional to 18,651.40, 27,968.90 and 9,884.30 is: 14,822.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,651.40 : 27,968.90 = 9,884.30 : x
  2. Step 2: Convert to fraction form
    18,651.40/27,968.90 = 9,884.30/x
  3. Step 3: Cross multiply
    18,651.40x = 27,968.90 × 9,884.30
  4. Step 4: Simplify right side
    18,651.40x = 276,452,809.00
  5. Step 5: Solve for x
    x = 276,452,809.00/18,651.40
  6. Step 6: Final answer
    x = 14,822.10

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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.