Home / 20,817.95-28,731.54-11,745.17

Finding the Fourth Proportional to 20,817.95, 28,731.54 and 11,745.17

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Solution

The fourth proportional to 20,817.95, 28,731.54 and 11,745.17 is: 16,209.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.95 : 28,731.54 = 11,745.17 : x
  2. Step 2: Convert to fraction form
    20,817.95/28,731.54 = 11,745.17/x
  3. Step 3: Cross multiply
    20,817.95x = 28,731.54 × 11,745.17
  4. Step 4: Simplify right side
    20,817.95x = 337,456,829.79
  5. Step 5: Solve for x
    x = 337,456,829.79/20,817.95
  6. Step 6: Final answer
    x = 16,209.90

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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.