Home / 20,557.09-30,785.95-11,765.35

Finding the Fourth Proportional to 20,557.09, 30,785.95 and 11,765.35

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Solution

The fourth proportional to 20,557.09, 30,785.95 and 11,765.35 is: 17,619.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,557.09 : 30,785.95 = 11,765.35 : x
  2. Step 2: Convert to fraction form
    20,557.09/30,785.95 = 11,765.35/x
  3. Step 3: Cross multiply
    20,557.09x = 30,785.95 × 11,765.35
  4. Step 4: Simplify right side
    20,557.09x = 362,207,476.83
  5. Step 5: Solve for x
    x = 362,207,476.83/20,557.09
  6. Step 6: Final answer
    x = 17,619.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.