Home / 7,122.14-9,818.67-6,137.90

Finding the Fourth Proportional to 7,122.14, 9,818.67 and 6,137.90

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Solution

The fourth proportional to 7,122.14, 9,818.67 and 6,137.90 is: 8,461.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.14 : 9,818.67 = 6,137.90 : x
  2. Step 2: Convert to fraction form
    7,122.14/9,818.67 = 6,137.90/x
  3. Step 3: Cross multiply
    7,122.14x = 9,818.67 × 6,137.90
  4. Step 4: Simplify right side
    7,122.14x = 60,266,014.59
  5. Step 5: Solve for x
    x = 60,266,014.59/7,122.14
  6. Step 6: Final answer
    x = 8,461.78

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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.