Home / 20,122.30-27,756.16-12,961.49

Finding the Fourth Proportional to 20,122.30, 27,756.16 and 12,961.49

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Solution

The fourth proportional to 20,122.30, 27,756.16 and 12,961.49 is: 17,878.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,122.30 : 27,756.16 = 12,961.49 : x
  2. Step 2: Convert to fraction form
    20,122.30/27,756.16 = 12,961.49/x
  3. Step 3: Cross multiply
    20,122.30x = 27,756.16 × 12,961.49
  4. Step 4: Simplify right side
    20,122.30x = 359,761,227.27
  5. Step 5: Solve for x
    x = 359,761,227.27/20,122.30
  6. Step 6: Final answer
    x = 17,878.74

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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.