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Finding the Fourth Proportional to 18,676.98, 27,988.74 and 8,811.18

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Solution

The fourth proportional to 18,676.98, 27,988.74 and 8,811.18 is: 13,204.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,676.98 : 27,988.74 = 8,811.18 : x
  2. Step 2: Convert to fraction form
    18,676.98/27,988.74 = 8,811.18/x
  3. Step 3: Cross multiply
    18,676.98x = 27,988.74 × 8,811.18
  4. Step 4: Simplify right side
    18,676.98x = 246,613,826.11
  5. Step 5: Solve for x
    x = 246,613,826.11/18,676.98
  6. Step 6: Final answer
    x = 13,204.16

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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.