Home / 5,139.50-7,090.88-3,149.06

Finding the Fourth Proportional to 5,139.50, 7,090.88 and 3,149.06

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Solution

The fourth proportional to 5,139.50, 7,090.88 and 3,149.06 is: 4,344.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.50 : 7,090.88 = 3,149.06 : x
  2. Step 2: Convert to fraction form
    5,139.50/7,090.88 = 3,149.06/x
  3. Step 3: Cross multiply
    5,139.50x = 7,090.88 × 3,149.06
  4. Step 4: Simplify right side
    5,139.50x = 22,329,606.57
  5. Step 5: Solve for x
    x = 22,329,606.57/5,139.50
  6. Step 6: Final answer
    x = 4,344.70

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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.