Home / 15,786.09-21,783.88-8,712.49

Finding the Fourth Proportional to 15,786.09, 21,783.88 and 8,712.49

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Solution

The fourth proportional to 15,786.09, 21,783.88 and 8,712.49 is: 12,022.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,786.09 : 21,783.88 = 8,712.49 : x
  2. Step 2: Convert to fraction form
    15,786.09/21,783.88 = 8,712.49/x
  3. Step 3: Cross multiply
    15,786.09x = 21,783.88 × 8,712.49
  4. Step 4: Simplify right side
    15,786.09x = 189,791,836.66
  5. Step 5: Solve for x
    x = 189,791,836.66/15,786.09
  6. Step 6: Final answer
    x = 12,022.73

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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.