Home / 20,666.10-30,985.82-8,827.60

Finding the Fourth Proportional to 20,666.10, 30,985.82 and 8,827.60

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Solution

The fourth proportional to 20,666.10, 30,985.82 and 8,827.60 is: 13,235.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.10 : 30,985.82 = 8,827.60 : x
  2. Step 2: Convert to fraction form
    20,666.10/30,985.82 = 8,827.60/x
  3. Step 3: Cross multiply
    20,666.10x = 30,985.82 × 8,827.60
  4. Step 4: Simplify right side
    20,666.10x = 273,530,424.63
  5. Step 5: Solve for x
    x = 273,530,424.63/20,666.10
  6. Step 6: Final answer
    x = 13,235.71

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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.