Home / 20,675.73-28,533.11-12,722.61

Finding the Fourth Proportional to 20,675.73, 28,533.11 and 12,722.61

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Solution

The fourth proportional to 20,675.73, 28,533.11 and 12,722.61 is: 17,557.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,675.73 : 28,533.11 = 12,722.61 : x
  2. Step 2: Convert to fraction form
    20,675.73/28,533.11 = 12,722.61/x
  3. Step 3: Cross multiply
    20,675.73x = 28,533.11 × 12,722.61
  4. Step 4: Simplify right side
    20,675.73x = 363,015,567.00
  5. Step 5: Solve for x
    x = 363,015,567.00/20,675.73
  6. Step 6: Final answer
    x = 17,557.57

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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.