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Finding the Fourth Proportional to 18,491.83, 25,501.96 and 15,813.09

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Solution

The fourth proportional to 18,491.83, 25,501.96 and 15,813.09 is: 21,807.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.83 : 25,501.96 = 15,813.09 : x
  2. Step 2: Convert to fraction form
    18,491.83/25,501.96 = 15,813.09/x
  3. Step 3: Cross multiply
    18,491.83x = 25,501.96 × 15,813.09
  4. Step 4: Simplify right side
    18,491.83x = 403,264,806.62
  5. Step 5: Solve for x
    x = 403,264,806.62/18,491.83
  6. Step 6: Final answer
    x = 21,807.73

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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.