Home / 21,858.68-30,177.42-14,428.28

Finding the Fourth Proportional to 21,858.68, 30,177.42 and 14,428.28

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Solution

The fourth proportional to 21,858.68, 30,177.42 and 14,428.28 is: 19,919.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,858.68 : 30,177.42 = 14,428.28 : x
  2. Step 2: Convert to fraction form
    21,858.68/30,177.42 = 14,428.28/x
  3. Step 3: Cross multiply
    21,858.68x = 30,177.42 × 14,428.28
  4. Step 4: Simplify right side
    21,858.68x = 435,408,265.44
  5. Step 5: Solve for x
    x = 435,408,265.44/21,858.68
  6. Step 6: Final answer
    x = 19,919.24

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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.