Home / 12,118.55-16,722.45-6,813.86

Finding the Fourth Proportional to 12,118.55, 16,722.45 and 6,813.86

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Solution

The fourth proportional to 12,118.55, 16,722.45 and 6,813.86 is: 9,402.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,118.55 : 16,722.45 = 6,813.86 : x
  2. Step 2: Convert to fraction form
    12,118.55/16,722.45 = 6,813.86/x
  3. Step 3: Cross multiply
    12,118.55x = 16,722.45 × 6,813.86
  4. Step 4: Simplify right side
    12,118.55x = 113,944,349.54
  5. Step 5: Solve for x
    x = 113,944,349.54/12,118.55
  6. Step 6: Final answer
    x = 9,402.48

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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.