Home / 39,390.94-54,360.22-21,486.58

Finding the Fourth Proportional to 39,390.94, 54,360.22 and 21,486.58

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Solution

The fourth proportional to 39,390.94, 54,360.22 and 21,486.58 is: 29,651.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,390.94 : 54,360.22 = 21,486.58 : x
  2. Step 2: Convert to fraction form
    39,390.94/54,360.22 = 21,486.58/x
  3. Step 3: Cross multiply
    39,390.94x = 54,360.22 × 21,486.58
  4. Step 4: Simplify right side
    39,390.94x = 1,168,015,215.85
  5. Step 5: Solve for x
    x = 1,168,015,215.85/39,390.94
  6. Step 6: Final answer
    x = 29,651.87

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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.