Home / 30,450.19-42,028.04-18,511

Finding the Fourth Proportional to 30,450.19, 42,028.04 and 18,511

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Solution

The fourth proportional to 30,450.19, 42,028.04 and 18,511 is: 25,549.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,450.19 : 42,028.04 = 18,511 : x
  2. Step 2: Convert to fraction form
    30,450.19/42,028.04 = 18,511/x
  3. Step 3: Cross multiply
    30,450.19x = 42,028.04 × 18,511
  4. Step 4: Simplify right side
    30,450.19x = 777,981,048.44
  5. Step 5: Solve for x
    x = 777,981,048.44/30,450.19
  6. Step 6: Final answer
    x = 25,549.30

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Double scale
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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.