Home / 13,406.09-18,495.86-8,691.30

Finding the Fourth Proportional to 13,406.09, 18,495.86 and 8,691.30

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Solution

The fourth proportional to 13,406.09, 18,495.86 and 8,691.30 is: 11,991.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,406.09 : 18,495.86 = 8,691.30 : x
  2. Step 2: Convert to fraction form
    13,406.09/18,495.86 = 8,691.30/x
  3. Step 3: Cross multiply
    13,406.09x = 18,495.86 × 8,691.30
  4. Step 4: Simplify right side
    13,406.09x = 160,753,024.56
  5. Step 5: Solve for x
    x = 160,753,024.56/13,406.09
  6. Step 6: Final answer
    x = 11,991.05

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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.