Home / 5,139.90-7,089.40-3,226.28

Finding the Fourth Proportional to 5,139.90, 7,089.40 and 3,226.28

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Solution

The fourth proportional to 5,139.90, 7,089.40 and 3,226.28 is: 4,449.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.90 : 7,089.40 = 3,226.28 : x
  2. Step 2: Convert to fraction form
    5,139.90/7,089.40 = 3,226.28/x
  3. Step 3: Cross multiply
    5,139.90x = 7,089.40 × 3,226.28
  4. Step 4: Simplify right side
    5,139.90x = 22,872,363.64
  5. Step 5: Solve for x
    x = 22,872,363.64/5,139.90
  6. Step 6: Final answer
    x = 4,449.96

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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.