Home / 6,900.20-9,511.70-5,405.46

Finding the Fourth Proportional to 6,900.20, 9,511.70 and 5,405.46

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Solution

The fourth proportional to 6,900.20, 9,511.70 and 5,405.46 is: 7,451.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,900.20 : 9,511.70 = 5,405.46 : x
  2. Step 2: Convert to fraction form
    6,900.20/9,511.70 = 5,405.46/x
  3. Step 3: Cross multiply
    6,900.20x = 9,511.70 × 5,405.46
  4. Step 4: Simplify right side
    6,900.20x = 51,415,113.88
  5. Step 5: Solve for x
    x = 51,415,113.88/6,900.20
  6. Step 6: Final answer
    x = 7,451.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.