Home / 12,345.03-18,518.22-3,580.65

Finding the Fourth Proportional to 12,345.03, 18,518.22 and 3,580.65

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Solution

The fourth proportional to 12,345.03, 18,518.22 and 3,580.65 is: 5,371.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,345.03 : 18,518.22 = 3,580.65 : x
  2. Step 2: Convert to fraction form
    12,345.03/18,518.22 = 3,580.65/x
  3. Step 3: Cross multiply
    12,345.03x = 18,518.22 × 3,580.65
  4. Step 4: Simplify right side
    12,345.03x = 66,307,264.44
  5. Step 5: Solve for x
    x = 66,307,264.44/12,345.03
  6. Step 6: Final answer
    x = 5,371.17

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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.