Home / 39,142.02-54,015.58-21,236.88

Finding the Fourth Proportional to 39,142.02, 54,015.58 and 21,236.88

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Solution

The fourth proportional to 39,142.02, 54,015.58 and 21,236.88 is: 29,306.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,142.02 : 54,015.58 = 21,236.88 : x
  2. Step 2: Convert to fraction form
    39,142.02/54,015.58 = 21,236.88/x
  3. Step 3: Cross multiply
    39,142.02x = 54,015.58 × 21,236.88
  4. Step 4: Simplify right side
    39,142.02x = 1,147,122,390.59
  5. Step 5: Solve for x
    x = 1,147,122,390.59/39,142.02
  6. Step 6: Final answer
    x = 29,306.67

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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.