Home / 39,423.05-54,404.09-21,518.20

Finding the Fourth Proportional to 39,423.05, 54,404.09 and 21,518.20

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Solution

The fourth proportional to 39,423.05, 54,404.09 and 21,518.20 is: 29,695.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,423.05 : 54,404.09 = 21,518.20 : x
  2. Step 2: Convert to fraction form
    39,423.05/54,404.09 = 21,518.20/x
  3. Step 3: Cross multiply
    39,423.05x = 54,404.09 × 21,518.20
  4. Step 4: Simplify right side
    39,423.05x = 1,170,678,089.44
  5. Step 5: Solve for x
    x = 1,170,678,089.44/39,423.05
  6. Step 6: Final answer
    x = 29,695.27

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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.