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Finding the Fourth Proportional to 19,327.80, 28,991.70 and 14,662.20

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Solution

The fourth proportional to 19,327.80, 28,991.70 and 14,662.20 is: 21,993.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,327.80 : 28,991.70 = 14,662.20 : x
  2. Step 2: Convert to fraction form
    19,327.80/28,991.70 = 14,662.20/x
  3. Step 3: Cross multiply
    19,327.80x = 28,991.70 × 14,662.20
  4. Step 4: Simplify right side
    19,327.80x = 425,082,103.74
  5. Step 5: Solve for x
    x = 425,082,103.74/19,327.80
  6. Step 6: Final answer
    x = 21,993.30

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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.