Home / 21,236.39-31,850.34-20,182.58

Finding the Fourth Proportional to 21,236.39, 31,850.34 and 20,182.58

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Solution

The fourth proportional to 21,236.39, 31,850.34 and 20,182.58 is: 30,269.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,236.39 : 31,850.34 = 20,182.58 : x
  2. Step 2: Convert to fraction form
    21,236.39/31,850.34 = 20,182.58/x
  3. Step 3: Cross multiply
    21,236.39x = 31,850.34 × 20,182.58
  4. Step 4: Simplify right side
    21,236.39x = 642,822,155.50
  5. Step 5: Solve for x
    x = 642,822,155.50/21,236.39
  6. Step 6: Final answer
    x = 30,269.84

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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.