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Finding the Fourth Proportional to 8,603.10, 11,874.80 and 5,619.40

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Solution

The fourth proportional to 8,603.10, 11,874.80 and 5,619.40 is: 7,756.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,603.10 : 11,874.80 = 5,619.40 : x
  2. Step 2: Convert to fraction form
    8,603.10/11,874.80 = 5,619.40/x
  3. Step 3: Cross multiply
    8,603.10x = 11,874.80 × 5,619.40
  4. Step 4: Simplify right side
    8,603.10x = 66,729,251.12
  5. Step 5: Solve for x
    x = 66,729,251.12/8,603.10
  6. Step 6: Final answer
    x = 7,756.42

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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.