Home / 7,120.78-10,679.92-1,925.44

Finding the Fourth Proportional to 7,120.78, 10,679.92 and 1,925.44

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Solution

The fourth proportional to 7,120.78, 10,679.92 and 1,925.44 is: 2,887.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.78 : 10,679.92 = 1,925.44 : x
  2. Step 2: Convert to fraction form
    7,120.78/10,679.92 = 1,925.44/x
  3. Step 3: Cross multiply
    7,120.78x = 10,679.92 × 1,925.44
  4. Step 4: Simplify right side
    7,120.78x = 20,563,513.65
  5. Step 5: Solve for x
    x = 20,563,513.65/7,120.78
  6. Step 6: Final answer
    x = 2,887.82

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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.