Home / 28,139.49-38,833.39-15,393.38

Finding the Fourth Proportional to 28,139.49, 38,833.39 and 15,393.38

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Solution

The fourth proportional to 28,139.49, 38,833.39 and 15,393.38 is: 21,243.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,139.49 : 38,833.39 = 15,393.38 : x
  2. Step 2: Convert to fraction form
    28,139.49/38,833.39 = 15,393.38/x
  3. Step 3: Cross multiply
    28,139.49x = 38,833.39 × 15,393.38
  4. Step 4: Simplify right side
    28,139.49x = 597,777,128.96
  5. Step 5: Solve for x
    x = 597,777,128.96/28,139.49
  6. Step 6: Final answer
    x = 21,243.35

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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.