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Finding the Fourth Proportional to 28,960.34, 43,440.94 and 11,430

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Solution

The fourth proportional to 28,960.34, 43,440.94 and 11,430 is: 17,145.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,960.34 : 43,440.94 = 11,430 : x
  2. Step 2: Convert to fraction form
    28,960.34/43,440.94 = 11,430/x
  3. Step 3: Cross multiply
    28,960.34x = 43,440.94 × 11,430
  4. Step 4: Simplify right side
    28,960.34x = 496,529,958.49
  5. Step 5: Solve for x
    x = 496,529,958.49/28,960.34
  6. Step 6: Final answer
    x = 17,145.17

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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.