Home / 5,173.59-7,139.56-2,815.75

Finding the Fourth Proportional to 5,173.59, 7,139.56 and 2,815.75

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Solution

The fourth proportional to 5,173.59, 7,139.56 and 2,815.75 is: 3,885.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,173.59 : 7,139.56 = 2,815.75 : x
  2. Step 2: Convert to fraction form
    5,173.59/7,139.56 = 2,815.75/x
  3. Step 3: Cross multiply
    5,173.59x = 7,139.56 × 2,815.75
  4. Step 4: Simplify right side
    5,173.59x = 20,103,223.23
  5. Step 5: Solve for x
    x = 20,103,223.23/5,173.59
  6. Step 6: Final answer
    x = 3,885.74

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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.