Home / 7,128.71-10,688.96-2,745.60

Finding the Fourth Proportional to 7,128.71, 10,688.96 and 2,745.60

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Solution

The fourth proportional to 7,128.71, 10,688.96 and 2,745.60 is: 4,116.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.71 : 10,688.96 = 2,745.60 : x
  2. Step 2: Convert to fraction form
    7,128.71/10,688.96 = 2,745.60/x
  3. Step 3: Cross multiply
    7,128.71x = 10,688.96 × 2,745.60
  4. Step 4: Simplify right side
    7,128.71x = 29,347,575.36
  5. Step 5: Solve for x
    x = 29,347,575.36/7,128.71
  6. Step 6: Final answer
    x = 4,116.82

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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.