Home / 12,126.20-16,732.80-6,820.91

Finding the Fourth Proportional to 12,126.20, 16,732.80 and 6,820.91

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Solution

The fourth proportional to 12,126.20, 16,732.80 and 6,820.91 is: 9,412.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,126.20 : 16,732.80 = 6,820.91 : x
  2. Step 2: Convert to fraction form
    12,126.20/16,732.80 = 6,820.91/x
  3. Step 3: Cross multiply
    12,126.20x = 16,732.80 × 6,820.91
  4. Step 4: Simplify right side
    12,126.20x = 114,132,839.18
  5. Step 5: Solve for x
    x = 114,132,839.18/12,126.20
  6. Step 6: Final answer
    x = 9,412.09

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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.