Home / 5,173.47-7,139.41-2,815.62

Finding the Fourth Proportional to 5,173.47, 7,139.41 and 2,815.62

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Solution

The fourth proportional to 5,173.47, 7,139.41 and 2,815.62 is: 3,885.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,173.47 : 7,139.41 = 2,815.62 : x
  2. Step 2: Convert to fraction form
    5,173.47/7,139.41 = 2,815.62/x
  3. Step 3: Cross multiply
    5,173.47x = 7,139.41 × 2,815.62
  4. Step 4: Simplify right side
    5,173.47x = 20,101,865.58
  5. Step 5: Solve for x
    x = 20,101,865.58/5,173.47
  6. Step 6: Final answer
    x = 3,885.57

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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.