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Finding the Fourth Proportional to 19,139.50, 26,415 and 10,756

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Solution

The fourth proportional to 19,139.50, 26,415 and 10,756 is: 14,844.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,139.50 : 26,415 = 10,756 : x
  2. Step 2: Convert to fraction form
    19,139.50/26,415 = 10,756/x
  3. Step 3: Cross multiply
    19,139.50x = 26,415 × 10,756
  4. Step 4: Simplify right side
    19,139.50x = 284,119,740
  5. Step 5: Solve for x
    x = 284,119,740/19,139.50
  6. Step 6: Final answer
    x = 14,844.68

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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.