Home / 13,539.20-18,684.50-7,571.92

Finding the Fourth Proportional to 13,539.20, 18,684.50 and 7,571.92

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Solution

The fourth proportional to 13,539.20, 18,684.50 and 7,571.92 is: 10,449.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,539.20 : 18,684.50 = 7,571.92 : x
  2. Step 2: Convert to fraction form
    13,539.20/18,684.50 = 7,571.92/x
  3. Step 3: Cross multiply
    13,539.20x = 18,684.50 × 7,571.92
  4. Step 4: Simplify right side
    13,539.20x = 141,477,539.24
  5. Step 5: Solve for x
    x = 141,477,539.24/13,539.20
  6. Step 6: Final answer
    x = 10,449.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.