Home / 20,631.10-30,950.63-8,784.66

Finding the Fourth Proportional to 20,631.10, 30,950.63 and 8,784.66

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Solution

The fourth proportional to 20,631.10, 30,950.63 and 8,784.66 is: 13,178.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.10 : 30,950.63 = 8,784.66 : x
  2. Step 2: Convert to fraction form
    20,631.10/30,950.63 = 8,784.66/x
  3. Step 3: Cross multiply
    20,631.10x = 30,950.63 × 8,784.66
  4. Step 4: Simplify right side
    20,631.10x = 271,890,761.34
  5. Step 5: Solve for x
    x = 271,890,761.34/20,631.10
  6. Step 6: Final answer
    x = 13,178.68

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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.