Home / 15,128.44-20,871.42-11,158.96

Finding the Fourth Proportional to 15,128.44, 20,871.42 and 11,158.96

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Solution

The fourth proportional to 15,128.44, 20,871.42 and 11,158.96 is: 15,395.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.44 : 20,871.42 = 11,158.96 : x
  2. Step 2: Convert to fraction form
    15,128.44/20,871.42 = 11,158.96/x
  3. Step 3: Cross multiply
    15,128.44x = 20,871.42 × 11,158.96
  4. Step 4: Simplify right side
    15,128.44x = 232,903,340.92
  5. Step 5: Solve for x
    x = 232,903,340.92/15,128.44
  6. Step 6: Final answer
    x = 15,395.07

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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.