Home / 13,731.12-20,580.48-6,328.80

Finding the Fourth Proportional to 13,731.12, 20,580.48 and 6,328.80

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Solution

The fourth proportional to 13,731.12, 20,580.48 and 6,328.80 is: 9,485.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,731.12 : 20,580.48 = 6,328.80 : x
  2. Step 2: Convert to fraction form
    13,731.12/20,580.48 = 6,328.80/x
  3. Step 3: Cross multiply
    13,731.12x = 20,580.48 × 6,328.80
  4. Step 4: Simplify right side
    13,731.12x = 130,249,741.82
  5. Step 5: Solve for x
    x = 130,249,741.82/13,731.12
  6. Step 6: Final answer
    x = 9,485.73

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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.