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Finding the Fourth Proportional to 18,907.17, 28,311.21 and 13,330.32

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Solution

The fourth proportional to 18,907.17, 28,311.21 and 13,330.32 is: 19,960.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.17 : 28,311.21 = 13,330.32 : x
  2. Step 2: Convert to fraction form
    18,907.17/28,311.21 = 13,330.32/x
  3. Step 3: Cross multiply
    18,907.17x = 28,311.21 × 13,330.32
  4. Step 4: Simplify right side
    18,907.17x = 377,397,488.89
  5. Step 5: Solve for x
    x = 377,397,488.89/18,907.17
  6. Step 6: Final answer
    x = 19,960.55

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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.