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Finding the Fourth Proportional to 21,583.91, 32,379.93 and 8,435.45

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Solution

The fourth proportional to 21,583.91, 32,379.93 and 8,435.45 is: 12,654.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,583.91 : 32,379.93 = 8,435.45 : x
  2. Step 2: Convert to fraction form
    21,583.91/32,379.93 = 8,435.45/x
  3. Step 3: Cross multiply
    21,583.91x = 32,379.93 × 8,435.45
  4. Step 4: Simplify right side
    21,583.91x = 273,139,118.62
  5. Step 5: Solve for x
    x = 273,139,118.62/21,583.91
  6. Step 6: Final answer
    x = 12,654.76

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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.