Home / 21,155.40-29,185.06-13,600.33

Finding the Fourth Proportional to 21,155.40, 29,185.06 and 13,600.33

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Solution

The fourth proportional to 21,155.40, 29,185.06 and 13,600.33 is: 18,762.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.40 : 29,185.06 = 13,600.33 : x
  2. Step 2: Convert to fraction form
    21,155.40/29,185.06 = 13,600.33/x
  3. Step 3: Cross multiply
    21,155.40x = 29,185.06 × 13,600.33
  4. Step 4: Simplify right side
    21,155.40x = 396,926,447.07
  5. Step 5: Solve for x
    x = 396,926,447.07/21,155.40
  6. Step 6: Final answer
    x = 18,762.42

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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.