Home / 12,345.19-18,519.61-3,578.97

Finding the Fourth Proportional to 12,345.19, 18,519.61 and 3,578.97

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Solution

The fourth proportional to 12,345.19, 18,519.61 and 3,578.97 is: 5,368.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,345.19 : 18,519.61 = 3,578.97 : x
  2. Step 2: Convert to fraction form
    12,345.19/18,519.61 = 3,578.97/x
  3. Step 3: Cross multiply
    12,345.19x = 18,519.61 × 3,578.97
  4. Step 4: Simplify right side
    12,345.19x = 66,281,128.60
  5. Step 5: Solve for x
    x = 66,281,128.60/12,345.19
  6. Step 6: Final answer
    x = 5,368.98

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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.