Home / 20,431.82-28,130.73-17,435.63

Finding the Fourth Proportional to 20,431.82, 28,130.73 and 17,435.63

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Solution

The fourth proportional to 20,431.82, 28,130.73 and 17,435.63 is: 24,005.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.82 : 28,130.73 = 17,435.63 : x
  2. Step 2: Convert to fraction form
    20,431.82/28,130.73 = 17,435.63/x
  3. Step 3: Cross multiply
    20,431.82x = 28,130.73 × 17,435.63
  4. Step 4: Simplify right side
    20,431.82x = 490,476,999.91
  5. Step 5: Solve for x
    x = 490,476,999.91/20,431.82
  6. Step 6: Final answer
    x = 24,005.55

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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.