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Finding the Fourth Proportional to 18,958.88, 28,433.16 and 7,868.72

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Solution

The fourth proportional to 18,958.88, 28,433.16 and 7,868.72 is: 11,800.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,958.88 : 28,433.16 = 7,868.72 : x
  2. Step 2: Convert to fraction form
    18,958.88/28,433.16 = 7,868.72/x
  3. Step 3: Cross multiply
    18,958.88x = 28,433.16 × 7,868.72
  4. Step 4: Simplify right side
    18,958.88x = 223,732,574.76
  5. Step 5: Solve for x
    x = 223,732,574.76/18,958.88
  6. Step 6: Final answer
    x = 11,800.94

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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.