Home / 15,778.90-21,759.33-12,240.82

Finding the Fourth Proportional to 15,778.90, 21,759.33 and 12,240.82

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Solution

The fourth proportional to 15,778.90, 21,759.33 and 12,240.82 is: 16,880.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,778.90 : 21,759.33 = 12,240.82 : x
  2. Step 2: Convert to fraction form
    15,778.90/21,759.33 = 12,240.82/x
  3. Step 3: Cross multiply
    15,778.90x = 21,759.33 × 12,240.82
  4. Step 4: Simplify right side
    15,778.90x = 266,352,041.85
  5. Step 5: Solve for x
    x = 266,352,041.85/15,778.90
  6. Step 6: Final answer
    x = 16,880.27

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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.