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Finding the Fourth Proportional to 18,714.10, 28,103.55 and 9,966.10

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Solution

The fourth proportional to 18,714.10, 28,103.55 and 9,966.10 is: 14,966.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,714.10 : 28,103.55 = 9,966.10 : x
  2. Step 2: Convert to fraction form
    18,714.10/28,103.55 = 9,966.10/x
  3. Step 3: Cross multiply
    18,714.10x = 28,103.55 × 9,966.10
  4. Step 4: Simplify right side
    18,714.10x = 280,082,789.66
  5. Step 5: Solve for x
    x = 280,082,789.66/18,714.10
  6. Step 6: Final answer
    x = 14,966.40

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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.