Home / 13,536.26-20,290.56-7,680.50

Finding the Fourth Proportional to 13,536.26, 20,290.56 and 7,680.50

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Solution

The fourth proportional to 13,536.26, 20,290.56 and 7,680.50 is: 11,512.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,536.26 : 20,290.56 = 7,680.50 : x
  2. Step 2: Convert to fraction form
    13,536.26/20,290.56 = 7,680.50/x
  3. Step 3: Cross multiply
    13,536.26x = 20,290.56 × 7,680.50
  4. Step 4: Simplify right side
    13,536.26x = 155,841,646.08
  5. Step 5: Solve for x
    x = 155,841,646.08/13,536.26
  6. Step 6: Final answer
    x = 11,512.90

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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.