Home / 12,880.92-19,321.74-3,521.07

Finding the Fourth Proportional to 12,880.92, 19,321.74 and 3,521.07

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Solution

The fourth proportional to 12,880.92, 19,321.74 and 3,521.07 is: 5,281.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,880.92 : 19,321.74 = 3,521.07 : x
  2. Step 2: Convert to fraction form
    12,880.92/19,321.74 = 3,521.07/x
  3. Step 3: Cross multiply
    12,880.92x = 19,321.74 × 3,521.07
  4. Step 4: Simplify right side
    12,880.92x = 68,033,199.06
  5. Step 5: Solve for x
    x = 68,033,199.06/12,880.92
  6. Step 6: Final answer
    x = 5,281.70

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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.