Home / 21,858.36-30,164.38-12,426.92

Finding the Fourth Proportional to 21,858.36, 30,164.38 and 12,426.92

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Solution

The fourth proportional to 21,858.36, 30,164.38 and 12,426.92 is: 17,149.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,858.36 : 30,164.38 = 12,426.92 : x
  2. Step 2: Convert to fraction form
    21,858.36/30,164.38 = 12,426.92/x
  3. Step 3: Cross multiply
    21,858.36x = 30,164.38 × 12,426.92
  4. Step 4: Simplify right side
    21,858.36x = 374,850,337.11
  5. Step 5: Solve for x
    x = 374,850,337.11/21,858.36
  6. Step 6: Final answer
    x = 17,149.06

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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.