Home / 20,765.40-31,152.15-8,283.30

Finding the Fourth Proportional to 20,765.40, 31,152.15 and 8,283.30

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Solution

The fourth proportional to 20,765.40, 31,152.15 and 8,283.30 is: 12,426.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.40 : 31,152.15 = 8,283.30 : x
  2. Step 2: Convert to fraction form
    20,765.40/31,152.15 = 8,283.30/x
  3. Step 3: Cross multiply
    20,765.40x = 31,152.15 × 8,283.30
  4. Step 4: Simplify right side
    20,765.40x = 258,042,604.10
  5. Step 5: Solve for x
    x = 258,042,604.10/20,765.40
  6. Step 6: Final answer
    x = 12,426.57

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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.