Home / 20,270.16-27,986.66-13,208.90

Finding the Fourth Proportional to 20,270.16, 27,986.66 and 13,208.90

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Solution

The fourth proportional to 20,270.16, 27,986.66 and 13,208.90 is: 18,237.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,270.16 : 27,986.66 = 13,208.90 : x
  2. Step 2: Convert to fraction form
    20,270.16/27,986.66 = 13,208.90/x
  3. Step 3: Cross multiply
    20,270.16x = 27,986.66 × 13,208.90
  4. Step 4: Simplify right side
    20,270.16x = 369,672,787.30
  5. Step 5: Solve for x
    x = 369,672,787.30/20,270.16
  6. Step 6: Final answer
    x = 18,237.29

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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.