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Finding the Fourth Proportional to 28,000, 42,000 and 11,584

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Solution

The fourth proportional to 28,000, 42,000 and 11,584 is: 17,376

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,000 : 42,000 = 11,584 : x
  2. Step 2: Convert to fraction form
    28,000/42,000 = 11,584/x
  3. Step 3: Cross multiply
    28,000x = 42,000 × 11,584
  4. Step 4: Simplify right side
    28,000x = 486,528,000
  5. Step 5: Solve for x
    x = 486,528,000/28,000
  6. Step 6: Final answer
    x = 17,376

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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.