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Finding the Fourth Proportional to 13,603.10, 20,404.65 and 12,837.65

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Solution

The fourth proportional to 13,603.10, 20,404.65 and 12,837.65 is: 19,256.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,603.10 : 20,404.65 = 12,837.65 : x
  2. Step 2: Convert to fraction form
    13,603.10/20,404.65 = 12,837.65/x
  3. Step 3: Cross multiply
    13,603.10x = 20,404.65 × 12,837.65
  4. Step 4: Simplify right side
    13,603.10x = 261,947,755.07
  5. Step 5: Solve for x
    x = 261,947,755.07/13,603.10
  6. Step 6: Final answer
    x = 19,256.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.