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Finding the Fourth Proportional to 18,687.60, 28,002.24 and 13,069.44

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Solution

The fourth proportional to 18,687.60, 28,002.24 and 13,069.44 is: 19,583.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.60 : 28,002.24 = 13,069.44 : x
  2. Step 2: Convert to fraction form
    18,687.60/28,002.24 = 13,069.44/x
  3. Step 3: Cross multiply
    18,687.60x = 28,002.24 × 13,069.44
  4. Step 4: Simplify right side
    18,687.60x = 365,973,595.55
  5. Step 5: Solve for x
    x = 365,973,595.55/18,687.60
  6. Step 6: Final answer
    x = 19,583.77

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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.