Home / 13,674.12-18,869.75-7,707

Finding the Fourth Proportional to 13,674.12, 18,869.75 and 7,707

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Solution

The fourth proportional to 13,674.12, 18,869.75 and 7,707 is: 10,635.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,674.12 : 18,869.75 = 7,707 : x
  2. Step 2: Convert to fraction form
    13,674.12/18,869.75 = 7,707/x
  3. Step 3: Cross multiply
    13,674.12x = 18,869.75 × 7,707
  4. Step 4: Simplify right side
    13,674.12x = 145,429,163.25
  5. Step 5: Solve for x
    x = 145,429,163.25/13,674.12
  6. Step 6: Final answer
    x = 10,635.36

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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.