Home / 20,616.40-30,929.39-8,770.82

Finding the Fourth Proportional to 20,616.40, 30,929.39 and 8,770.82

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Solution

The fourth proportional to 20,616.40, 30,929.39 and 8,770.82 is: 13,158.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,616.40 : 30,929.39 = 8,770.82 : x
  2. Step 2: Convert to fraction form
    20,616.40/30,929.39 = 8,770.82/x
  3. Step 3: Cross multiply
    20,616.40x = 30,929.39 × 8,770.82
  4. Step 4: Simplify right side
    20,616.40x = 271,276,112.40
  5. Step 5: Solve for x
    x = 271,276,112.40/20,616.40
  6. Step 6: Final answer
    x = 13,158.27

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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.