Home / 39,622.72-54,679.36-21,717.80

Finding the Fourth Proportional to 39,622.72, 54,679.36 and 21,717.80

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Solution

The fourth proportional to 39,622.72, 54,679.36 and 21,717.80 is: 29,970.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,622.72 : 54,679.36 = 21,717.80 : x
  2. Step 2: Convert to fraction form
    39,622.72/54,679.36 = 21,717.80/x
  3. Step 3: Cross multiply
    39,622.72x = 54,679.36 × 21,717.80
  4. Step 4: Simplify right side
    39,622.72x = 1,187,515,404.61
  5. Step 5: Solve for x
    x = 1,187,515,404.61/39,622.72
  6. Step 6: Final answer
    x = 29,970.57

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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.