Home / 13,409.18-18,507.36-7,744.85

Finding the Fourth Proportional to 13,409.18, 18,507.36 and 7,744.85

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Solution

The fourth proportional to 13,409.18, 18,507.36 and 7,744.85 is: 10,689.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,409.18 : 18,507.36 = 7,744.85 : x
  2. Step 2: Convert to fraction form
    13,409.18/18,507.36 = 7,744.85/x
  3. Step 3: Cross multiply
    13,409.18x = 18,507.36 × 7,744.85
  4. Step 4: Simplify right side
    13,409.18x = 143,336,634.56
  5. Step 5: Solve for x
    x = 143,336,634.56/13,409.18
  6. Step 6: Final answer
    x = 10,689.44

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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.