Home / 8,435.90-12,661.56-4,278.78

Finding the Fourth Proportional to 8,435.90, 12,661.56 and 4,278.78

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Solution

The fourth proportional to 8,435.90, 12,661.56 and 4,278.78 is: 6,422.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,435.90 : 12,661.56 = 4,278.78 : x
  2. Step 2: Convert to fraction form
    8,435.90/12,661.56 = 4,278.78/x
  3. Step 3: Cross multiply
    8,435.90x = 12,661.56 × 4,278.78
  4. Step 4: Simplify right side
    8,435.90x = 54,176,029.70
  5. Step 5: Solve for x
    x = 54,176,029.70/8,435.90
  6. Step 6: Final answer
    x = 6,422.08

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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.