Home / 13,534.26-20,287.56-7,678.50

Finding the Fourth Proportional to 13,534.26, 20,287.56 and 7,678.50

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Solution

The fourth proportional to 13,534.26, 20,287.56 and 7,678.50 is: 11,509.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,534.26 : 20,287.56 = 7,678.50 : x
  2. Step 2: Convert to fraction form
    13,534.26/20,287.56 = 7,678.50/x
  3. Step 3: Cross multiply
    13,534.26x = 20,287.56 × 7,678.50
  4. Step 4: Simplify right side
    13,534.26x = 155,778,029.46
  5. Step 5: Solve for x
    x = 155,778,029.46/13,534.26
  6. Step 6: Final answer
    x = 11,509.90

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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.