Home / 20,611.37-28,443.15-11,412.61

Finding the Fourth Proportional to 20,611.37, 28,443.15 and 11,412.61

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Solution

The fourth proportional to 20,611.37, 28,443.15 and 11,412.61 is: 15,749.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,611.37 : 28,443.15 = 11,412.61 : x
  2. Step 2: Convert to fraction form
    20,611.37/28,443.15 = 11,412.61/x
  3. Step 3: Cross multiply
    20,611.37x = 28,443.15 × 11,412.61
  4. Step 4: Simplify right side
    20,611.37x = 324,610,507.01
  5. Step 5: Solve for x
    x = 324,610,507.01/20,611.37
  6. Step 6: Final answer
    x = 15,749.10

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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.