Home / 7,289.60-10,926.30-3,128.90

Finding the Fourth Proportional to 7,289.60, 10,926.30 and 3,128.90

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Solution

The fourth proportional to 7,289.60, 10,926.30 and 3,128.90 is: 4,689.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,289.60 : 10,926.30 = 3,128.90 : x
  2. Step 2: Convert to fraction form
    7,289.60/10,926.30 = 3,128.90/x
  3. Step 3: Cross multiply
    7,289.60x = 10,926.30 × 3,128.90
  4. Step 4: Simplify right side
    7,289.60x = 34,187,300.07
  5. Step 5: Solve for x
    x = 34,187,300.07/7,289.60
  6. Step 6: Final answer
    x = 4,689.87

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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.