Home / 20,561.43-30,851.54-11,187.40

Finding the Fourth Proportional to 20,561.43, 30,851.54 and 11,187.40

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Solution

The fourth proportional to 20,561.43, 30,851.54 and 11,187.40 is: 16,786.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.43 : 30,851.54 = 11,187.40 : x
  2. Step 2: Convert to fraction form
    20,561.43/30,851.54 = 11,187.40/x
  3. Step 3: Cross multiply
    20,561.43x = 30,851.54 × 11,187.40
  4. Step 4: Simplify right side
    20,561.43x = 345,148,518.60
  5. Step 5: Solve for x
    x = 345,148,518.60/20,561.43
  6. Step 6: Final answer
    x = 16,786.21

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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.