Home / 39,153.99-54,031.41-21,690.69

Finding the Fourth Proportional to 39,153.99, 54,031.41 and 21,690.69

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Solution

The fourth proportional to 39,153.99, 54,031.41 and 21,690.69 is: 29,932.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,153.99 : 54,031.41 = 21,690.69 : x
  2. Step 2: Convert to fraction form
    39,153.99/54,031.41 = 21,690.69/x
  3. Step 3: Cross multiply
    39,153.99x = 54,031.41 × 21,690.69
  4. Step 4: Simplify right side
    39,153.99x = 1,171,978,564.57
  5. Step 5: Solve for x
    x = 1,171,978,564.57/39,153.99
  6. Step 6: Final answer
    x = 29,932.54

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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.