Home / 6,511.76-9,765.40-2,128.13

Finding the Fourth Proportional to 6,511.76, 9,765.40 and 2,128.13

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Solution

The fourth proportional to 6,511.76, 9,765.40 and 2,128.13 is: 3,191.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,511.76 : 9,765.40 = 2,128.13 : x
  2. Step 2: Convert to fraction form
    6,511.76/9,765.40 = 2,128.13/x
  3. Step 3: Cross multiply
    6,511.76x = 9,765.40 × 2,128.13
  4. Step 4: Simplify right side
    6,511.76x = 20,782,040.70
  5. Step 5: Solve for x
    x = 20,782,040.70/6,511.76
  6. Step 6: Final answer
    x = 3,191.46

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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.