Home / 21,858.36-30,163.47-12,426.72

Finding the Fourth Proportional to 21,858.36, 30,163.47 and 12,426.72

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Solution

The fourth proportional to 21,858.36, 30,163.47 and 12,426.72 is: 17,148.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,858.36 : 30,163.47 = 12,426.72 : x
  2. Step 2: Convert to fraction form
    21,858.36/30,163.47 = 12,426.72/x
  3. Step 3: Cross multiply
    21,858.36x = 30,163.47 × 12,426.72
  4. Step 4: Simplify right side
    21,858.36x = 374,832,995.92
  5. Step 5: Solve for x
    x = 374,832,995.92/21,858.36
  6. Step 6: Final answer
    x = 17,148.27

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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.