Home / 12,123.10-16,729.73-6,818.81

Finding the Fourth Proportional to 12,123.10, 16,729.73 and 6,818.81

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Solution

The fourth proportional to 12,123.10, 16,729.73 and 6,818.81 is: 9,409.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,123.10 : 16,729.73 = 6,818.81 : x
  2. Step 2: Convert to fraction form
    12,123.10/16,729.73 = 6,818.81/x
  3. Step 3: Cross multiply
    12,123.10x = 16,729.73 × 6,818.81
  4. Step 4: Simplify right side
    12,123.10x = 114,076,857.95
  5. Step 5: Solve for x
    x = 114,076,857.95/12,123.10
  6. Step 6: Final answer
    x = 9,409.88

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Half scale
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Double scale
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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.