Home / 28,315.52-39,076.80-15,740

Finding the Fourth Proportional to 28,315.52, 39,076.80 and 15,740

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Solution

The fourth proportional to 28,315.52, 39,076.80 and 15,740 is: 21,721.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,315.52 : 39,076.80 = 15,740 : x
  2. Step 2: Convert to fraction form
    28,315.52/39,076.80 = 15,740/x
  3. Step 3: Cross multiply
    28,315.52x = 39,076.80 × 15,740
  4. Step 4: Simplify right side
    28,315.52x = 615,068,832
  5. Step 5: Solve for x
    x = 615,068,832/28,315.52
  6. Step 6: Final answer
    x = 21,721.97

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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.