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Finding the Fourth Proportional to 18,388.60, 25,371.84 and 10,834.36

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Solution

The fourth proportional to 18,388.60, 25,371.84 and 10,834.36 is: 14,948.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,388.60 : 25,371.84 = 10,834.36 : x
  2. Step 2: Convert to fraction form
    18,388.60/25,371.84 = 10,834.36/x
  3. Step 3: Cross multiply
    18,388.60x = 25,371.84 × 10,834.36
  4. Step 4: Simplify right side
    18,388.60x = 274,887,648.42
  5. Step 5: Solve for x
    x = 274,887,648.42/18,388.60
  6. Step 6: Final answer
    x = 14,948.81

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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.