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Finding the Fourth Proportional to 18,709.60, 25,817.79 and 10,750.15

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Solution

The fourth proportional to 18,709.60, 25,817.79 and 10,750.15 is: 14,834.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.60 : 25,817.79 = 10,750.15 : x
  2. Step 2: Convert to fraction form
    18,709.60/25,817.79 = 10,750.15/x
  3. Step 3: Cross multiply
    18,709.60x = 25,817.79 × 10,750.15
  4. Step 4: Simplify right side
    18,709.60x = 277,545,115.17
  5. Step 5: Solve for x
    x = 277,545,115.17/18,709.60
  6. Step 6: Final answer
    x = 14,834.37

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1.5x scale

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.