Home / 12,118.12-16,722.16-6,813.72

Finding the Fourth Proportional to 12,118.12, 16,722.16 and 6,813.72

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Solution

The fourth proportional to 12,118.12, 16,722.16 and 6,813.72 is: 9,402.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,118.12 : 16,722.16 = 6,813.72 : x
  2. Step 2: Convert to fraction form
    12,118.12/16,722.16 = 6,813.72/x
  3. Step 3: Cross multiply
    12,118.12x = 16,722.16 × 6,813.72
  4. Step 4: Simplify right side
    12,118.12x = 113,940,116.04
  5. Step 5: Solve for x
    x = 113,940,116.04/12,118.12
  6. Step 6: Final answer
    x = 9,402.46

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Half scale
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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.