Home / 15,847.80-21,874.26-9,135.60

Finding the Fourth Proportional to 15,847.80, 21,874.26 and 9,135.60

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Solution

The fourth proportional to 15,847.80, 21,874.26 and 9,135.60 is: 12,609.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,847.80 : 21,874.26 = 9,135.60 : x
  2. Step 2: Convert to fraction form
    15,847.80/21,874.26 = 9,135.60/x
  3. Step 3: Cross multiply
    15,847.80x = 21,874.26 × 9,135.60
  4. Step 4: Simplify right side
    15,847.80x = 199,834,489.66
  5. Step 5: Solve for x
    x = 199,834,489.66/15,847.80
  6. Step 6: Final answer
    x = 12,609.60

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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.