Home / 12,126.52-16,729.86-6,820.12

Finding the Fourth Proportional to 12,126.52, 16,729.86 and 6,820.12

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Solution

The fourth proportional to 12,126.52, 16,729.86 and 6,820.12 is: 9,409.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,126.52 : 16,729.86 = 6,820.12 : x
  2. Step 2: Convert to fraction form
    12,126.52/16,729.86 = 6,820.12/x
  3. Step 3: Cross multiply
    12,126.52x = 16,729.86 × 6,820.12
  4. Step 4: Simplify right side
    12,126.52x = 114,099,652.78
  5. Step 5: Solve for x
    x = 114,099,652.78/12,126.52
  6. Step 6: Final answer
    x = 9,409.10

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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.