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Finding the Fourth Proportional to 18,714.84, 28,073.64 and 5,387.30

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Solution

The fourth proportional to 18,714.84, 28,073.64 and 5,387.30 is: 8,081.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,714.84 : 28,073.64 = 5,387.30 : x
  2. Step 2: Convert to fraction form
    18,714.84/28,073.64 = 5,387.30/x
  3. Step 3: Cross multiply
    18,714.84x = 28,073.64 × 5,387.30
  4. Step 4: Simplify right side
    18,714.84x = 151,241,120.77
  5. Step 5: Solve for x
    x = 151,241,120.77/18,714.84
  6. Step 6: Final answer
    x = 8,081.35

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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.