Home / 12,345.71-18,520.38-3,579.48

Finding the Fourth Proportional to 12,345.71, 18,520.38 and 3,579.48

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Solution

The fourth proportional to 12,345.71, 18,520.38 and 3,579.48 is: 5,369.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,345.71 : 18,520.38 = 3,579.48 : x
  2. Step 2: Convert to fraction form
    12,345.71/18,520.38 = 3,579.48/x
  3. Step 3: Cross multiply
    12,345.71x = 18,520.38 × 3,579.48
  4. Step 4: Simplify right side
    12,345.71x = 66,293,329.80
  5. Step 5: Solve for x
    x = 66,293,329.80/12,345.71
  6. Step 6: Final answer
    x = 5,369.75

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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.