Home / 30,668.28-42,305.13-21,107.04

Finding the Fourth Proportional to 30,668.28, 42,305.13 and 21,107.04

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Solution

The fourth proportional to 30,668.28, 42,305.13 and 21,107.04 is: 29,115.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,668.28 : 42,305.13 = 21,107.04 : x
  2. Step 2: Convert to fraction form
    30,668.28/42,305.13 = 21,107.04/x
  3. Step 3: Cross multiply
    30,668.28x = 42,305.13 × 21,107.04
  4. Step 4: Simplify right side
    30,668.28x = 892,936,071.12
  5. Step 5: Solve for x
    x = 892,936,071.12/30,668.28
  6. Step 6: Final answer
    x = 29,115.95

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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.