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Finding the Fourth Proportional to 30,390.50, 41,940.53 and 17,819.30

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Solution

The fourth proportional to 30,390.50, 41,940.53 and 17,819.30 is: 24,591.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,390.50 : 41,940.53 = 17,819.30 : x
  2. Step 2: Convert to fraction form
    30,390.50/41,940.53 = 17,819.30/x
  3. Step 3: Cross multiply
    30,390.50x = 41,940.53 × 17,819.30
  4. Step 4: Simplify right side
    30,390.50x = 747,350,886.23
  5. Step 5: Solve for x
    x = 747,350,886.23/30,390.50
  6. Step 6: Final answer
    x = 24,591.60

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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.