Home / 18,720.48-28,090.56-7,635.36

Finding the Fourth Proportional to 18,720.48, 28,090.56 and 7,635.36

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Solution

The fourth proportional to 18,720.48, 28,090.56 and 7,635.36 is: 11,457.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.48 : 28,090.56 = 7,635.36 : x
  2. Step 2: Convert to fraction form
    18,720.48/28,090.56 = 7,635.36/x
  3. Step 3: Cross multiply
    18,720.48x = 28,090.56 × 7,635.36
  4. Step 4: Simplify right side
    18,720.48x = 214,481,538.20
  5. Step 5: Solve for x
    x = 214,481,538.20/18,720.48
  6. Step 6: Final answer
    x = 11,457.05

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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.