Home / 28,493.25-39,320.64-15,918

Finding the Fourth Proportional to 28,493.25, 39,320.64 and 15,918

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Solution

The fourth proportional to 28,493.25, 39,320.64 and 15,918 is: 21,966.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,493.25 : 39,320.64 = 15,918 : x
  2. Step 2: Convert to fraction form
    28,493.25/39,320.64 = 15,918/x
  3. Step 3: Cross multiply
    28,493.25x = 39,320.64 × 15,918
  4. Step 4: Simplify right side
    28,493.25x = 625,905,947.52
  5. Step 5: Solve for x
    x = 625,905,947.52/28,493.25
  6. Step 6: Final answer
    x = 21,966.81

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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.