Home / 13,685.78-20,534.24-4,921.38

Finding the Fourth Proportional to 13,685.78, 20,534.24 and 4,921.38

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Solution

The fourth proportional to 13,685.78, 20,534.24 and 4,921.38 is: 7,384.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.78 : 20,534.24 = 4,921.38 : x
  2. Step 2: Convert to fraction form
    13,685.78/20,534.24 = 4,921.38/x
  3. Step 3: Cross multiply
    13,685.78x = 20,534.24 × 4,921.38
  4. Step 4: Simplify right side
    13,685.78x = 101,056,810.35
  5. Step 5: Solve for x
    x = 101,056,810.35/13,685.78
  6. Step 6: Final answer
    x = 7,384.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.