Home / 30,940.15-42,732.21-20,910.01

Finding the Fourth Proportional to 30,940.15, 42,732.21 and 20,910.01

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Solution

The fourth proportional to 30,940.15, 42,732.21 and 20,910.01 is: 28,879.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,940.15 : 42,732.21 = 20,910.01 : x
  2. Step 2: Convert to fraction form
    30,940.15/42,732.21 = 20,910.01/x
  3. Step 3: Cross multiply
    30,940.15x = 42,732.21 × 20,910.01
  4. Step 4: Simplify right side
    30,940.15x = 893,530,938.42
  5. Step 5: Solve for x
    x = 893,530,938.42/30,940.15
  6. Step 6: Final answer
    x = 28,879.33

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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.