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Finding the Fourth Proportional to 18,927.60, 28,408.97 and 9,574.22

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Solution

The fourth proportional to 18,927.60, 28,408.97 and 9,574.22 is: 14,370.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,927.60 : 28,408.97 = 9,574.22 : x
  2. Step 2: Convert to fraction form
    18,927.60/28,408.97 = 9,574.22/x
  3. Step 3: Cross multiply
    18,927.60x = 28,408.97 × 9,574.22
  4. Step 4: Simplify right side
    18,927.60x = 271,993,728.75
  5. Step 5: Solve for x
    x = 271,993,728.75/18,927.60
  6. Step 6: Final answer
    x = 14,370.22

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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.