Home / 20,292.12-27,980.34-13,112.58

Finding the Fourth Proportional to 20,292.12, 27,980.34 and 13,112.58

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Solution

The fourth proportional to 20,292.12, 27,980.34 and 13,112.58 is: 18,080.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,292.12 : 27,980.34 = 13,112.58 : x
  2. Step 2: Convert to fraction form
    20,292.12/27,980.34 = 13,112.58/x
  3. Step 3: Cross multiply
    20,292.12x = 27,980.34 × 13,112.58
  4. Step 4: Simplify right side
    20,292.12x = 366,894,502.43
  5. Step 5: Solve for x
    x = 366,894,502.43/20,292.12
  6. Step 6: Final answer
    x = 18,080.64

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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.