Home / 30,788.01-42,481.40-18,213.57

Finding the Fourth Proportional to 30,788.01, 42,481.40 and 18,213.57

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Solution

The fourth proportional to 30,788.01, 42,481.40 and 18,213.57 is: 25,131.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,788.01 : 42,481.40 = 18,213.57 : x
  2. Step 2: Convert to fraction form
    30,788.01/42,481.40 = 18,213.57/x
  3. Step 3: Cross multiply
    30,788.01x = 42,481.40 × 18,213.57
  4. Step 4: Simplify right side
    30,788.01x = 773,737,861.53
  5. Step 5: Solve for x
    x = 773,737,861.53/30,788.01
  6. Step 6: Final answer
    x = 25,131.14

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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.