Home / 15,862.44-21,890.16-8,788.80

Finding the Fourth Proportional to 15,862.44, 21,890.16 and 8,788.80

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Solution

The fourth proportional to 15,862.44, 21,890.16 and 8,788.80 is: 12,128.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,862.44 : 21,890.16 = 8,788.80 : x
  2. Step 2: Convert to fraction form
    15,862.44/21,890.16 = 8,788.80/x
  3. Step 3: Cross multiply
    15,862.44x = 21,890.16 × 8,788.80
  4. Step 4: Simplify right side
    15,862.44x = 192,388,238.21
  5. Step 5: Solve for x
    x = 192,388,238.21/15,862.44
  6. Step 6: Final answer
    x = 12,128.54

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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.