Home / 28,268.40-39,010.20-15,521.79

Finding the Fourth Proportional to 28,268.40, 39,010.20 and 15,521.79

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Solution

The fourth proportional to 28,268.40, 39,010.20 and 15,521.79 is: 21,419.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,268.40 : 39,010.20 = 15,521.79 : x
  2. Step 2: Convert to fraction form
    28,268.40/39,010.20 = 15,521.79/x
  3. Step 3: Cross multiply
    28,268.40x = 39,010.20 × 15,521.79
  4. Step 4: Simplify right side
    28,268.40x = 605,508,132.26
  5. Step 5: Solve for x
    x = 605,508,132.26/28,268.40
  6. Step 6: Final answer
    x = 21,419.96

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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.