Home / 6,438.78-8,873.40-4,445.78

Finding the Fourth Proportional to 6,438.78, 8,873.40 and 4,445.78

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Solution

The fourth proportional to 6,438.78, 8,873.40 and 4,445.78 is: 6,126.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,438.78 : 8,873.40 = 4,445.78 : x
  2. Step 2: Convert to fraction form
    6,438.78/8,873.40 = 4,445.78/x
  3. Step 3: Cross multiply
    6,438.78x = 8,873.40 × 4,445.78
  4. Step 4: Simplify right side
    6,438.78x = 39,449,184.25
  5. Step 5: Solve for x
    x = 39,449,184.25/6,438.78
  6. Step 6: Final answer
    x = 6,126.81

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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.