Home / 13,391.68-18,479.28-7,727.44

Finding the Fourth Proportional to 13,391.68, 18,479.28 and 7,727.44

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Solution

The fourth proportional to 13,391.68, 18,479.28 and 7,727.44 is: 10,663.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.68 : 18,479.28 = 7,727.44 : x
  2. Step 2: Convert to fraction form
    13,391.68/18,479.28 = 7,727.44/x
  3. Step 3: Cross multiply
    13,391.68x = 18,479.28 × 7,727.44
  4. Step 4: Simplify right side
    13,391.68x = 142,797,527.44
  5. Step 5: Solve for x
    x = 142,797,527.44/13,391.68
  6. Step 6: Final answer
    x = 10,663.15

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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.