Home / 11,720.80-17,581.36-4,322.40

Finding the Fourth Proportional to 11,720.80, 17,581.36 and 4,322.40

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Solution

The fourth proportional to 11,720.80, 17,581.36 and 4,322.40 is: 6,483.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,720.80 : 17,581.36 = 4,322.40 : x
  2. Step 2: Convert to fraction form
    11,720.80/17,581.36 = 4,322.40/x
  3. Step 3: Cross multiply
    11,720.80x = 17,581.36 × 4,322.40
  4. Step 4: Simplify right side
    11,720.80x = 75,993,670.46
  5. Step 5: Solve for x
    x = 75,993,670.46/11,720.80
  6. Step 6: Final answer
    x = 6,483.66

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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.