Home / 20,645.33-28,485.67-12,147.82

Finding the Fourth Proportional to 20,645.33, 28,485.67 and 12,147.82

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Solution

The fourth proportional to 20,645.33, 28,485.67 and 12,147.82 is: 16,761.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.33 : 28,485.67 = 12,147.82 : x
  2. Step 2: Convert to fraction form
    20,645.33/28,485.67 = 12,147.82/x
  3. Step 3: Cross multiply
    20,645.33x = 28,485.67 × 12,147.82
  4. Step 4: Simplify right side
    20,645.33x = 346,038,791.74
  5. Step 5: Solve for x
    x = 346,038,791.74/20,645.33
  6. Step 6: Final answer
    x = 16,761.12

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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.