Home / 3,500.90-5,251.56-1,420.86

Finding the Fourth Proportional to 3,500.90, 5,251.56 and 1,420.86

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Solution

The fourth proportional to 3,500.90, 5,251.56 and 1,420.86 is: 2,131.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,500.90 : 5,251.56 = 1,420.86 : x
  2. Step 2: Convert to fraction form
    3,500.90/5,251.56 = 1,420.86/x
  3. Step 3: Cross multiply
    3,500.90x = 5,251.56 × 1,420.86
  4. Step 4: Simplify right side
    3,500.90x = 7,461,731.54
  5. Step 5: Solve for x
    x = 7,461,731.54/3,500.90
  6. Step 6: Final answer
    x = 2,131.38

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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.