Home / 11,381.80-15,708.86-7,136.48

Finding the Fourth Proportional to 11,381.80, 15,708.86 and 7,136.48

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Solution

The fourth proportional to 11,381.80, 15,708.86 and 7,136.48 is: 9,849.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,381.80 : 15,708.86 = 7,136.48 : x
  2. Step 2: Convert to fraction form
    11,381.80/15,708.86 = 7,136.48/x
  3. Step 3: Cross multiply
    11,381.80x = 15,708.86 × 7,136.48
  4. Step 4: Simplify right side
    11,381.80x = 112,105,965.21
  5. Step 5: Solve for x
    x = 112,105,965.21/11,381.80
  6. Step 6: Final answer
    x = 9,849.58

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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.