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Finding the Fourth Proportional to 18,348.70, 25,322.07 and 10,390.75

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Solution

The fourth proportional to 18,348.70, 25,322.07 and 10,390.75 is: 14,339.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,348.70 : 25,322.07 = 10,390.75 : x
  2. Step 2: Convert to fraction form
    18,348.70/25,322.07 = 10,390.75/x
  3. Step 3: Cross multiply
    18,348.70x = 25,322.07 × 10,390.75
  4. Step 4: Simplify right side
    18,348.70x = 263,115,298.85
  5. Step 5: Solve for x
    x = 263,115,298.85/18,348.70
  6. Step 6: Final answer
    x = 14,339.72

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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.