Home / 6,979.61-9,629.81-4,145.56

Finding the Fourth Proportional to 6,979.61, 9,629.81 and 4,145.56

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Solution

The fourth proportional to 6,979.61, 9,629.81 and 4,145.56 is: 5,719.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,979.61 : 9,629.81 = 4,145.56 : x
  2. Step 2: Convert to fraction form
    6,979.61/9,629.81 = 4,145.56/x
  3. Step 3: Cross multiply
    6,979.61x = 9,629.81 × 4,145.56
  4. Step 4: Simplify right side
    6,979.61x = 39,920,945.17
  5. Step 5: Solve for x
    x = 39,920,945.17/6,979.61
  6. Step 6: Final answer
    x = 5,719.66

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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.