Home / 5,173.41-7,139.05-2,815.50

Finding the Fourth Proportional to 5,173.41, 7,139.05 and 2,815.50

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Solution

The fourth proportional to 5,173.41, 7,139.05 and 2,815.50 is: 3,885.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,173.41 : 7,139.05 = 2,815.50 : x
  2. Step 2: Convert to fraction form
    5,173.41/7,139.05 = 2,815.50/x
  3. Step 3: Cross multiply
    5,173.41x = 7,139.05 × 2,815.50
  4. Step 4: Simplify right side
    5,173.41x = 20,099,995.28
  5. Step 5: Solve for x
    x = 20,099,995.28/5,173.41
  6. Step 6: Final answer
    x = 3,885.25

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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.