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Finding the Fourth Proportional to 18,491.64, 25,537.12 and 11,780.30

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Solution

The fourth proportional to 18,491.64, 25,537.12 and 11,780.30 is: 16,268.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.64 : 25,537.12 = 11,780.30 : x
  2. Step 2: Convert to fraction form
    18,491.64/25,537.12 = 11,780.30/x
  3. Step 3: Cross multiply
    18,491.64x = 25,537.12 × 11,780.30
  4. Step 4: Simplify right side
    18,491.64x = 300,834,934.74
  5. Step 5: Solve for x
    x = 300,834,934.74/18,491.64
  6. Step 6: Final answer
    x = 16,268.70

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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.