Home / 20,961.93-28,912.80-14,235.87

Finding the Fourth Proportional to 20,961.93, 28,912.80 and 14,235.87

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Solution

The fourth proportional to 20,961.93, 28,912.80 and 14,235.87 is: 19,635.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.93 : 28,912.80 = 14,235.87 : x
  2. Step 2: Convert to fraction form
    20,961.93/28,912.80 = 14,235.87/x
  3. Step 3: Cross multiply
    20,961.93x = 28,912.80 × 14,235.87
  4. Step 4: Simplify right side
    20,961.93x = 411,598,862.14
  5. Step 5: Solve for x
    x = 411,598,862.14/20,961.93
  6. Step 6: Final answer
    x = 19,635.54

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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.