Home / 39,285.99-54,213.63-21,380.61

Finding the Fourth Proportional to 39,285.99, 54,213.63 and 21,380.61

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Solution

The fourth proportional to 39,285.99, 54,213.63 and 21,380.61 is: 29,504.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,285.99 : 54,213.63 = 21,380.61 : x
  2. Step 2: Convert to fraction form
    39,285.99/54,213.63 = 21,380.61/x
  3. Step 3: Cross multiply
    39,285.99x = 54,213.63 × 21,380.61
  4. Step 4: Simplify right side
    39,285.99x = 1,159,120,479.71
  5. Step 5: Solve for x
    x = 1,159,120,479.71/39,285.99
  6. Step 6: Final answer
    x = 29,504.68

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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.