Home / 39,343.91-54,295.20-21,438.89

Finding the Fourth Proportional to 39,343.91, 54,295.20 and 21,438.89

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Solution

The fourth proportional to 39,343.91, 54,295.20 and 21,438.89 is: 29,585.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,343.91 : 54,295.20 = 21,438.89 : x
  2. Step 2: Convert to fraction form
    39,343.91/54,295.20 = 21,438.89/x
  3. Step 3: Cross multiply
    39,343.91x = 54,295.20 × 21,438.89
  4. Step 4: Simplify right side
    39,343.91x = 1,164,028,548.85
  5. Step 5: Solve for x
    x = 1,164,028,548.85/39,343.91
  6. Step 6: Final answer
    x = 29,585.99

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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.