Home / 20,126.42-27,778.40-12,853.84

Finding the Fourth Proportional to 20,126.42, 27,778.40 and 12,853.84

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Solution

The fourth proportional to 20,126.42, 27,778.40 and 12,853.84 is: 17,740.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,126.42 : 27,778.40 = 12,853.84 : x
  2. Step 2: Convert to fraction form
    20,126.42/27,778.40 = 12,853.84/x
  3. Step 3: Cross multiply
    20,126.42x = 27,778.40 × 12,853.84
  4. Step 4: Simplify right side
    20,126.42x = 357,059,109.06
  5. Step 5: Solve for x
    x = 357,059,109.06/20,126.42
  6. Step 6: Final answer
    x = 17,740.82

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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.