Home / 28,486.89-39,304.31-15,911.37

Finding the Fourth Proportional to 28,486.89, 39,304.31 and 15,911.37

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Solution

The fourth proportional to 28,486.89, 39,304.31 and 15,911.37 is: 21,953.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,486.89 : 39,304.31 = 15,911.37 : x
  2. Step 2: Convert to fraction form
    28,486.89/39,304.31 = 15,911.37/x
  3. Step 3: Cross multiply
    28,486.89x = 39,304.31 × 15,911.37
  4. Step 4: Simplify right side
    28,486.89x = 625,385,339.45
  5. Step 5: Solve for x
    x = 625,385,339.45/28,486.89
  6. Step 6: Final answer
    x = 21,953.44

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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.