Home / 39,509.90-54,523.28-21,604.72

Finding the Fourth Proportional to 39,509.90, 54,523.28 and 21,604.72

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Solution

The fourth proportional to 39,509.90, 54,523.28 and 21,604.72 is: 29,814.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,509.90 : 54,523.28 = 21,604.72 : x
  2. Step 2: Convert to fraction form
    39,509.90/54,523.28 = 21,604.72/x
  3. Step 3: Cross multiply
    39,509.90x = 54,523.28 × 21,604.72
  4. Step 4: Simplify right side
    39,509.90x = 1,177,960,197.88
  5. Step 5: Solve for x
    x = 1,177,960,197.88/39,509.90
  6. Step 6: Final answer
    x = 29,814.30

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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.