Home / 13,680.34-20,495.79-6,290.98

Finding the Fourth Proportional to 13,680.34, 20,495.79 and 6,290.98

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Solution

The fourth proportional to 13,680.34, 20,495.79 and 6,290.98 is: 9,425.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.34 : 20,495.79 = 6,290.98 : x
  2. Step 2: Convert to fraction form
    13,680.34/20,495.79 = 6,290.98/x
  3. Step 3: Cross multiply
    13,680.34x = 20,495.79 × 6,290.98
  4. Step 4: Simplify right side
    13,680.34x = 128,938,604.97
  5. Step 5: Solve for x
    x = 128,938,604.97/13,680.34
  6. Step 6: Final answer
    x = 9,425.10

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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.