Home / 20,783.20-31,194.23-10,265.10

Finding the Fourth Proportional to 20,783.20, 31,194.23 and 10,265.10

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Solution

The fourth proportional to 20,783.20, 31,194.23 and 10,265.10 is: 15,407.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.20 : 31,194.23 = 10,265.10 : x
  2. Step 2: Convert to fraction form
    20,783.20/31,194.23 = 10,265.10/x
  3. Step 3: Cross multiply
    20,783.20x = 31,194.23 × 10,265.10
  4. Step 4: Simplify right side
    20,783.20x = 320,211,890.37
  5. Step 5: Solve for x
    x = 320,211,890.37/20,783.20
  6. Step 6: Final answer
    x = 15,407.25

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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.