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Finding the Fourth Proportional to 18,954.64, 28,431.68 and 5,806.96

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Solution

The fourth proportional to 18,954.64, 28,431.68 and 5,806.96 is: 8,710.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954.64 : 28,431.68 = 5,806.96 : x
  2. Step 2: Convert to fraction form
    18,954.64/28,431.68 = 5,806.96/x
  3. Step 3: Cross multiply
    18,954.64x = 28,431.68 × 5,806.96
  4. Step 4: Simplify right side
    18,954.64x = 165,101,628.49
  5. Step 5: Solve for x
    x = 165,101,628.49/18,954.64
  6. Step 6: Final answer
    x = 8,710.35

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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.