Home / 21,422.41-29,535.37-13,855.39

Finding the Fourth Proportional to 21,422.41, 29,535.37 and 13,855.39

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Solution

The fourth proportional to 21,422.41, 29,535.37 and 13,855.39 is: 19,102.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,422.41 : 29,535.37 = 13,855.39 : x
  2. Step 2: Convert to fraction form
    21,422.41/29,535.37 = 13,855.39/x
  3. Step 3: Cross multiply
    21,422.41x = 29,535.37 × 13,855.39
  4. Step 4: Simplify right side
    21,422.41x = 409,224,070.14
  5. Step 5: Solve for x
    x = 409,224,070.14/21,422.41
  6. Step 6: Final answer
    x = 19,102.62

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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.