Home / 28,386.56-39,173.76-15,812

Finding the Fourth Proportional to 28,386.56, 39,173.76 and 15,812

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Solution

The fourth proportional to 28,386.56, 39,173.76 and 15,812 is: 21,820.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,386.56 : 39,173.76 = 15,812 : x
  2. Step 2: Convert to fraction form
    28,386.56/39,173.76 = 15,812/x
  3. Step 3: Cross multiply
    28,386.56x = 39,173.76 × 15,812
  4. Step 4: Simplify right side
    28,386.56x = 619,415,493.12
  5. Step 5: Solve for x
    x = 619,415,493.12/28,386.56
  6. Step 6: Final answer
    x = 21,820.73

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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.