Home / 39,110.85-53,972.87-21,205.80

Finding the Fourth Proportional to 39,110.85, 53,972.87 and 21,205.80

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Solution

The fourth proportional to 39,110.85, 53,972.87 and 21,205.80 is: 29,263.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,110.85 : 53,972.87 = 21,205.80 : x
  2. Step 2: Convert to fraction form
    39,110.85/53,972.87 = 21,205.80/x
  3. Step 3: Cross multiply
    39,110.85x = 53,972.87 × 21,205.80
  4. Step 4: Simplify right side
    39,110.85x = 1,144,537,780.62
  5. Step 5: Solve for x
    x = 1,144,537,780.62/39,110.85
  6. Step 6: Final answer
    x = 29,263.95

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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.