Home / 20,257.90-27,957.09-11,305.78

Finding the Fourth Proportional to 20,257.90, 27,957.09 and 11,305.78

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Solution

The fourth proportional to 20,257.90, 27,957.09 and 11,305.78 is: 15,602.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,257.90 : 27,957.09 = 11,305.78 : x
  2. Step 2: Convert to fraction form
    20,257.90/27,957.09 = 11,305.78/x
  3. Step 3: Cross multiply
    20,257.90x = 27,957.09 × 11,305.78
  4. Step 4: Simplify right side
    20,257.90x = 316,076,708.98
  5. Step 5: Solve for x
    x = 316,076,708.98/20,257.90
  6. Step 6: Final answer
    x = 15,602.64

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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.