Home / 20,435.38-28,203.43-12,475.90

Finding the Fourth Proportional to 20,435.38, 28,203.43 and 12,475.90

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Solution

The fourth proportional to 20,435.38, 28,203.43 and 12,475.90 is: 17,218.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,435.38 : 28,203.43 = 12,475.90 : x
  2. Step 2: Convert to fraction form
    20,435.38/28,203.43 = 12,475.90/x
  3. Step 3: Cross multiply
    20,435.38x = 28,203.43 × 12,475.90
  4. Step 4: Simplify right side
    20,435.38x = 351,863,172.34
  5. Step 5: Solve for x
    x = 351,863,172.34/20,435.38
  6. Step 6: Final answer
    x = 17,218.33

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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.