Home / 21,855.36-30,155.88-13,894.68

Finding the Fourth Proportional to 21,855.36, 30,155.88 and 13,894.68

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Solution

The fourth proportional to 21,855.36, 30,155.88 and 13,894.68 is: 19,171.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,855.36 : 30,155.88 = 13,894.68 : x
  2. Step 2: Convert to fraction form
    21,855.36/30,155.88 = 13,894.68/x
  3. Step 3: Cross multiply
    21,855.36x = 30,155.88 × 13,894.68
  4. Step 4: Simplify right side
    21,855.36x = 419,006,302.72
  5. Step 5: Solve for x
    x = 419,006,302.72/21,855.36
  6. Step 6: Final answer
    x = 19,171.79

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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.