Home / 13,321.30-19,981.95-3,459.75

Finding the Fourth Proportional to 13,321.30, 19,981.95 and 3,459.75

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Solution

The fourth proportional to 13,321.30, 19,981.95 and 3,459.75 is: 5,189.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.30 : 19,981.95 = 3,459.75 : x
  2. Step 2: Convert to fraction form
    13,321.30/19,981.95 = 3,459.75/x
  3. Step 3: Cross multiply
    13,321.30x = 19,981.95 × 3,459.75
  4. Step 4: Simplify right side
    13,321.30x = 69,132,551.51
  5. Step 5: Solve for x
    x = 69,132,551.51/13,321.30
  6. Step 6: Final answer
    x = 5,189.63

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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.