Home / 13,938.65-20,911.41-4,078.11

Finding the Fourth Proportional to 13,938.65, 20,911.41 and 4,078.11

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Solution

The fourth proportional to 13,938.65, 20,911.41 and 4,078.11 is: 6,118.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.65 : 20,911.41 = 4,078.11 : x
  2. Step 2: Convert to fraction form
    13,938.65/20,911.41 = 4,078.11/x
  3. Step 3: Cross multiply
    13,938.65x = 20,911.41 × 4,078.11
  4. Step 4: Simplify right side
    13,938.65x = 85,279,030.24
  5. Step 5: Solve for x
    x = 85,279,030.24/13,938.65
  6. Step 6: Final answer
    x = 6,118.17

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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.