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Finding the Fourth Proportional to 4,986.75, 7,483.47 and 3,139.14

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Solution

The fourth proportional to 4,986.75, 7,483.47 and 3,139.14 is: 4,710.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,986.75 : 7,483.47 = 3,139.14 : x
  2. Step 2: Convert to fraction form
    4,986.75/7,483.47 = 3,139.14/x
  3. Step 3: Cross multiply
    4,986.75x = 7,483.47 × 3,139.14
  4. Step 4: Simplify right side
    4,986.75x = 23,491,660.02
  5. Step 5: Solve for x
    x = 23,491,660.02/4,986.75
  6. Step 6: Final answer
    x = 4,710.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.