Home / 20,291.94-27,980.07-13,112.40

Finding the Fourth Proportional to 20,291.94, 27,980.07 and 13,112.40

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Solution

The fourth proportional to 20,291.94, 27,980.07 and 13,112.40 is: 18,080.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.94 : 27,980.07 = 13,112.40 : x
  2. Step 2: Convert to fraction form
    20,291.94/27,980.07 = 13,112.40/x
  3. Step 3: Cross multiply
    20,291.94x = 27,980.07 × 13,112.40
  4. Step 4: Simplify right side
    20,291.94x = 366,885,869.87
  5. Step 5: Solve for x
    x = 366,885,869.87/20,291.94
  6. Step 6: Final answer
    x = 18,080.37

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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.