Home / 20,160.42-27,809.23-12,987.97

Finding the Fourth Proportional to 20,160.42, 27,809.23 and 12,987.97

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Solution

The fourth proportional to 20,160.42, 27,809.23 and 12,987.97 is: 17,915.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,160.42 : 27,809.23 = 12,987.97 : x
  2. Step 2: Convert to fraction form
    20,160.42/27,809.23 = 12,987.97/x
  3. Step 3: Cross multiply
    20,160.42x = 27,809.23 × 12,987.97
  4. Step 4: Simplify right side
    20,160.42x = 361,185,444.96
  5. Step 5: Solve for x
    x = 361,185,444.96/20,160.42
  6. Step 6: Final answer
    x = 17,915.57

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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.