Home / 20,286.12-27,977.70-13,117.16

Finding the Fourth Proportional to 20,286.12, 27,977.70 and 13,117.16

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Solution

The fourth proportional to 20,286.12, 27,977.70 and 13,117.16 is: 18,090.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,286.12 : 27,977.70 = 13,117.16 : x
  2. Step 2: Convert to fraction form
    20,286.12/27,977.70 = 13,117.16/x
  3. Step 3: Cross multiply
    20,286.12x = 27,977.70 × 13,117.16
  4. Step 4: Simplify right side
    20,286.12x = 366,987,967.33
  5. Step 5: Solve for x
    x = 366,987,967.33/20,286.12
  6. Step 6: Final answer
    x = 18,090.59

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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.