Home / 13,581.71-20,378.37-5,686.08

Finding the Fourth Proportional to 13,581.71, 20,378.37 and 5,686.08

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Solution

The fourth proportional to 13,581.71, 20,378.37 and 5,686.08 is: 8,531.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581.71 : 20,378.37 = 5,686.08 : x
  2. Step 2: Convert to fraction form
    13,581.71/20,378.37 = 5,686.08/x
  3. Step 3: Cross multiply
    13,581.71x = 20,378.37 × 5,686.08
  4. Step 4: Simplify right side
    13,581.71x = 115,872,986.99
  5. Step 5: Solve for x
    x = 115,872,986.99/13,581.71
  6. Step 6: Final answer
    x = 8,531.55

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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.