Home / 28,487.25-39,312.41-15,912

Finding the Fourth Proportional to 28,487.25, 39,312.41 and 15,912

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Solution

The fourth proportional to 28,487.25, 39,312.41 and 15,912 is: 21,958.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,487.25 : 39,312.41 = 15,912 : x
  2. Step 2: Convert to fraction form
    28,487.25/39,312.41 = 15,912/x
  3. Step 3: Cross multiply
    28,487.25x = 39,312.41 × 15,912
  4. Step 4: Simplify right side
    28,487.25x = 625,538,988.36
  5. Step 5: Solve for x
    x = 625,538,988.36/28,487.25
  6. Step 6: Final answer
    x = 21,958.56

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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.