Home / 20,784.40-31,193.16-10,929.44

Finding the Fourth Proportional to 20,784.40, 31,193.16 and 10,929.44

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Solution

The fourth proportional to 20,784.40, 31,193.16 and 10,929.44 is: 16,402.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.40 : 31,193.16 = 10,929.44 : x
  2. Step 2: Convert to fraction form
    20,784.40/31,193.16 = 10,929.44/x
  3. Step 3: Cross multiply
    20,784.40x = 31,193.16 × 10,929.44
  4. Step 4: Simplify right side
    20,784.40x = 340,923,770.63
  5. Step 5: Solve for x
    x = 340,923,770.63/20,784.40
  6. Step 6: Final answer
    x = 16,402.87

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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.