Home / 13,938.52-20,905.38-4,578.72

Finding the Fourth Proportional to 13,938.52, 20,905.38 and 4,578.72

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Solution

The fourth proportional to 13,938.52, 20,905.38 and 4,578.72 is: 6,867.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.52 : 20,905.38 = 4,578.72 : x
  2. Step 2: Convert to fraction form
    13,938.52/20,905.38 = 4,578.72/x
  3. Step 3: Cross multiply
    13,938.52x = 20,905.38 × 4,578.72
  4. Step 4: Simplify right side
    13,938.52x = 95,719,881.51
  5. Step 5: Solve for x
    x = 95,719,881.51/13,938.52
  6. Step 6: Final answer
    x = 6,867.29

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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.