Home / 39,635.91-54,698.09-21,730.87

Finding the Fourth Proportional to 39,635.91, 54,698.09 and 21,730.87

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Solution

The fourth proportional to 39,635.91, 54,698.09 and 21,730.87 is: 29,988.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,635.91 : 54,698.09 = 21,730.87 : x
  2. Step 2: Convert to fraction form
    39,635.91/54,698.09 = 21,730.87/x
  3. Step 3: Cross multiply
    39,635.91x = 54,698.09 × 21,730.87
  4. Step 4: Simplify right side
    39,635.91x = 1,188,636,965.84
  5. Step 5: Solve for x
    x = 1,188,636,965.84/39,635.91
  6. Step 6: Final answer
    x = 29,988.89

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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.