Home / 5,173.60-7,139.60-2,815.75

Finding the Fourth Proportional to 5,173.60, 7,139.60 and 2,815.75

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Solution

The fourth proportional to 5,173.60, 7,139.60 and 2,815.75 is: 3,885.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,173.60 : 7,139.60 = 2,815.75 : x
  2. Step 2: Convert to fraction form
    5,173.60/7,139.60 = 2,815.75/x
  3. Step 3: Cross multiply
    5,173.60x = 7,139.60 × 2,815.75
  4. Step 4: Simplify right side
    5,173.60x = 20,103,307.33
  5. Step 5: Solve for x
    x = 20,103,307.33/5,173.60
  6. Step 6: Final answer
    x = 3,885.75

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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.