Home / 13,778.09-20,655.63-6,387.83

Finding the Fourth Proportional to 13,778.09, 20,655.63 and 6,387.83

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Solution

The fourth proportional to 13,778.09, 20,655.63 and 6,387.83 is: 9,576.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.09 : 20,655.63 = 6,387.83 : x
  2. Step 2: Convert to fraction form
    13,778.09/20,655.63 = 6,387.83/x
  3. Step 3: Cross multiply
    13,778.09x = 20,655.63 × 6,387.83
  4. Step 4: Simplify right side
    13,778.09x = 131,944,652.98
  5. Step 5: Solve for x
    x = 131,944,652.98/13,778.09
  6. Step 6: Final answer
    x = 9,576.41

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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.