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Finding the Fourth Proportional to 8,603.75, 11,877.50 and 8,085.35

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Solution

The fourth proportional to 8,603.75, 11,877.50 and 8,085.35 is: 11,161.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,603.75 : 11,877.50 = 8,085.35 : x
  2. Step 2: Convert to fraction form
    8,603.75/11,877.50 = 8,085.35/x
  3. Step 3: Cross multiply
    8,603.75x = 11,877.50 × 8,085.35
  4. Step 4: Simplify right side
    8,603.75x = 96,033,744.63
  5. Step 5: Solve for x
    x = 96,033,744.63/8,603.75
  6. Step 6: Final answer
    x = 11,161.85

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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.