Home / 7,758.20-11,621.10-4,291.40

Finding the Fourth Proportional to 7,758.20, 11,621.10 and 4,291.40

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Solution

The fourth proportional to 7,758.20, 11,621.10 and 4,291.40 is: 6,428.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,758.20 : 11,621.10 = 4,291.40 : x
  2. Step 2: Convert to fraction form
    7,758.20/11,621.10 = 4,291.40/x
  3. Step 3: Cross multiply
    7,758.20x = 11,621.10 × 4,291.40
  4. Step 4: Simplify right side
    7,758.20x = 49,870,788.54
  5. Step 5: Solve for x
    x = 49,870,788.54/7,758.20
  6. Step 6: Final answer
    x = 6,428.14

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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.