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Finding the Fourth Proportional to 30,553.70, 45,743.07 and 18,787.64

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Solution

The fourth proportional to 30,553.70, 45,743.07 and 18,787.64 is: 28,127.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,553.70 : 45,743.07 = 18,787.64 : x
  2. Step 2: Convert to fraction form
    30,553.70/45,743.07 = 18,787.64/x
  3. Step 3: Cross multiply
    30,553.70x = 45,743.07 × 18,787.64
  4. Step 4: Simplify right side
    30,553.70x = 859,404,331.65
  5. Step 5: Solve for x
    x = 859,404,331.65/30,553.70
  6. Step 6: Final answer
    x = 28,127.67

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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.