Home / 28,108.21-38,791.79-15,535.39

Finding the Fourth Proportional to 28,108.21, 38,791.79 and 15,535.39

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Solution

The fourth proportional to 28,108.21, 38,791.79 and 15,535.39 is: 21,440.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,108.21 : 38,791.79 = 15,535.39 : x
  2. Step 2: Convert to fraction form
    28,108.21/38,791.79 = 15,535.39/x
  3. Step 3: Cross multiply
    28,108.21x = 38,791.79 × 15,535.39
  4. Step 4: Simplify right side
    28,108.21x = 602,645,586.45
  5. Step 5: Solve for x
    x = 602,645,586.45/28,108.21
  6. Step 6: Final answer
    x = 21,440.20

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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.