Home / 19,720.40-27,185.90-12,161.66

Finding the Fourth Proportional to 19,720.40, 27,185.90 and 12,161.66

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Solution

The fourth proportional to 19,720.40, 27,185.90 and 12,161.66 is: 16,765.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,720.40 : 27,185.90 = 12,161.66 : x
  2. Step 2: Convert to fraction form
    19,720.40/27,185.90 = 12,161.66/x
  3. Step 3: Cross multiply
    19,720.40x = 27,185.90 × 12,161.66
  4. Step 4: Simplify right side
    19,720.40x = 330,625,475.86
  5. Step 5: Solve for x
    x = 330,625,475.86/19,720.40
  6. Step 6: Final answer
    x = 16,765.66

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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.