Home / 38,912.55-53,701.94-21,687.60

Finding the Fourth Proportional to 38,912.55, 53,701.94 and 21,687.60

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Solution

The fourth proportional to 38,912.55, 53,701.94 and 21,687.60 is: 29,930.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,912.55 : 53,701.94 = 21,687.60 : x
  2. Step 2: Convert to fraction form
    38,912.55/53,701.94 = 21,687.60/x
  3. Step 3: Cross multiply
    38,912.55x = 53,701.94 × 21,687.60
  4. Step 4: Simplify right side
    38,912.55x = 1,164,666,025.48
  5. Step 5: Solve for x
    x = 1,164,666,025.48/38,912.55
  6. Step 6: Final answer
    x = 29,930.34

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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.