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Finding the Fourth Proportional to 8,535.78, 12,805.35 and 3,605.40

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Solution

The fourth proportional to 8,535.78, 12,805.35 and 3,605.40 is: 5,408.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,535.78 : 12,805.35 = 3,605.40 : x
  2. Step 2: Convert to fraction form
    8,535.78/12,805.35 = 3,605.40/x
  3. Step 3: Cross multiply
    8,535.78x = 12,805.35 × 3,605.40
  4. Step 4: Simplify right side
    8,535.78x = 46,168,408.89
  5. Step 5: Solve for x
    x = 46,168,408.89/8,535.78
  6. Step 6: Final answer
    x = 5,408.81

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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.