Home / 30,481.92-42,065.73-21,545.19

Finding the Fourth Proportional to 30,481.92, 42,065.73 and 21,545.19

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Solution

The fourth proportional to 30,481.92, 42,065.73 and 21,545.19 is: 29,732.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,481.92 : 42,065.73 = 21,545.19 : x
  2. Step 2: Convert to fraction form
    30,481.92/42,065.73 = 21,545.19/x
  3. Step 3: Cross multiply
    30,481.92x = 42,065.73 × 21,545.19
  4. Step 4: Simplify right side
    30,481.92x = 906,314,145.34
  5. Step 5: Solve for x
    x = 906,314,145.34/30,481.92
  6. Step 6: Final answer
    x = 29,732.84

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Double scale
Find fourth proportional to 30,482.92, 42,067.11 and 21,546.19
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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.