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Finding the Fourth Proportional to 30,606.20, 45,821.70 and 18,840.20

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Solution

The fourth proportional to 30,606.20, 45,821.70 and 18,840.20 is: 28,206.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,606.20 : 45,821.70 = 18,840.20 : x
  2. Step 2: Convert to fraction form
    30,606.20/45,821.70 = 18,840.20/x
  3. Step 3: Cross multiply
    30,606.20x = 45,821.70 × 18,840.20
  4. Step 4: Simplify right side
    30,606.20x = 863,289,992.34
  5. Step 5: Solve for x
    x = 863,289,992.34/30,606.20
  6. Step 6: Final answer
    x = 28,206.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.