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Finding the Fourth Proportional to 18,950.12, 28,435.43 and 7,864.46

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Solution

The fourth proportional to 18,950.12, 28,435.43 and 7,864.46 is: 11,800.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,950.12 : 28,435.43 = 7,864.46 : x
  2. Step 2: Convert to fraction form
    18,950.12/28,435.43 = 7,864.46/x
  3. Step 3: Cross multiply
    18,950.12x = 28,435.43 × 7,864.46
  4. Step 4: Simplify right side
    18,950.12x = 223,629,301.82
  5. Step 5: Solve for x
    x = 223,629,301.82/18,950.12
  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.