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Finding the Fourth Proportional to 8,435.57, 12,661.05 and 4,278.44

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Solution

The fourth proportional to 8,435.57, 12,661.05 and 4,278.44 is: 6,421.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,435.57 : 12,661.05 = 4,278.44 : x
  2. Step 2: Convert to fraction form
    8,435.57/12,661.05 = 4,278.44/x
  3. Step 3: Cross multiply
    8,435.57x = 12,661.05 × 4,278.44
  4. Step 4: Simplify right side
    8,435.57x = 54,169,590.46
  5. Step 5: Solve for x
    x = 54,169,590.46/8,435.57
  6. Step 6: Final answer
    x = 6,421.57

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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.