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Finding the Fourth Proportional to 18,958.73, 28,444.67 and 8,429.69

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Solution

The fourth proportional to 18,958.73, 28,444.67 and 8,429.69 is: 12,647.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,958.73 : 28,444.67 = 8,429.69 : x
  2. Step 2: Convert to fraction form
    18,958.73/28,444.67 = 8,429.69/x
  3. Step 3: Cross multiply
    18,958.73x = 28,444.67 × 8,429.69
  4. Step 4: Simplify right side
    18,958.73x = 239,779,710.83
  5. Step 5: Solve for x
    x = 239,779,710.83/18,958.73
  6. Step 6: Final answer
    x = 12,647.46

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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.