Home / 7,155.78-9,876.39-4,172.10

Finding the Fourth Proportional to 7,155.78, 9,876.39 and 4,172.10

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Solution

The fourth proportional to 7,155.78, 9,876.39 and 4,172.10 is: 5,758.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155.78 : 9,876.39 = 4,172.10 : x
  2. Step 2: Convert to fraction form
    7,155.78/9,876.39 = 4,172.10/x
  3. Step 3: Cross multiply
    7,155.78x = 9,876.39 × 4,172.10
  4. Step 4: Simplify right side
    7,155.78x = 41,205,286.72
  5. Step 5: Solve for x
    x = 41,205,286.72/7,155.78
  6. Step 6: Final answer
    x = 5,758.32

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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.