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Finding the Fourth Proportional to 30,620.70, 45,815.13 and 18,147.42

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Solution

The fourth proportional to 30,620.70, 45,815.13 and 18,147.42 is: 27,152.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,620.70 : 45,815.13 = 18,147.42 : x
  2. Step 2: Convert to fraction form
    30,620.70/45,815.13 = 18,147.42/x
  3. Step 3: Cross multiply
    30,620.70x = 45,815.13 × 18,147.42
  4. Step 4: Simplify right side
    30,620.70x = 831,426,406.46
  5. Step 5: Solve for x
    x = 831,426,406.46/30,620.70
  6. Step 6: Final answer
    x = 27,152.43

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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.