Home / 12,118.10-16,722.15-6,813.74

Finding the Fourth Proportional to 12,118.10, 16,722.15 and 6,813.74

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Solution

The fourth proportional to 12,118.10, 16,722.15 and 6,813.74 is: 9,402.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,118.10 : 16,722.15 = 6,813.74 : x
  2. Step 2: Convert to fraction form
    12,118.10/16,722.15 = 6,813.74/x
  3. Step 3: Cross multiply
    12,118.10x = 16,722.15 × 6,813.74
  4. Step 4: Simplify right side
    12,118.10x = 113,940,382.34
  5. Step 5: Solve for x
    x = 113,940,382.34/12,118.10
  6. Step 6: Final answer
    x = 9,402.50

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Half scale
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Double scale
Find fourth proportional to 12,119.10, 16,723.53 and 6,814.74
Similar ratio
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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.