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Finding the Fourth Proportional to 26,912, 37,143.68 and 15,136

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Solution

The fourth proportional to 26,912, 37,143.68 and 15,136 is: 20,890.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,912 : 37,143.68 = 15,136 : x
  2. Step 2: Convert to fraction form
    26,912/37,143.68 = 15,136/x
  3. Step 3: Cross multiply
    26,912x = 37,143.68 × 15,136
  4. Step 4: Simplify right side
    26,912x = 562,206,740.48
  5. Step 5: Solve for x
    x = 562,206,740.48/26,912
  6. Step 6: Final answer
    x = 20,890.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.