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Finding the Fourth Proportional to 13,603.83, 18,773.49 and 8,225.51

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Solution

The fourth proportional to 13,603.83, 18,773.49 and 8,225.51 is: 11,351.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,603.83 : 18,773.49 = 8,225.51 : x
  2. Step 2: Convert to fraction form
    13,603.83/18,773.49 = 8,225.51/x
  3. Step 3: Cross multiply
    13,603.83x = 18,773.49 × 8,225.51
  4. Step 4: Simplify right side
    13,603.83x = 154,421,435.86
  5. Step 5: Solve for x
    x = 154,421,435.86/13,603.83
  6. Step 6: Final answer
    x = 11,351.32

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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.