Home / 13,720.86-18,927.83-8,676.59

Finding the Fourth Proportional to 13,720.86, 18,927.83 and 8,676.59

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Solution

The fourth proportional to 13,720.86, 18,927.83 and 8,676.59 is: 11,969.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.86 : 18,927.83 = 8,676.59 : x
  2. Step 2: Convert to fraction form
    13,720.86/18,927.83 = 8,676.59/x
  3. Step 3: Cross multiply
    13,720.86x = 18,927.83 × 8,676.59
  4. Step 4: Simplify right side
    13,720.86x = 164,228,882.48
  5. Step 5: Solve for x
    x = 164,228,882.48/13,720.86
  6. Step 6: Final answer
    x = 11,969.28

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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.