Home / 6,428.40-8,876.70-4,074.72

Finding the Fourth Proportional to 6,428.40, 8,876.70 and 4,074.72

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Solution

The fourth proportional to 6,428.40, 8,876.70 and 4,074.72 is: 5,626.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,428.40 : 8,876.70 = 4,074.72 : x
  2. Step 2: Convert to fraction form
    6,428.40/8,876.70 = 4,074.72/x
  3. Step 3: Cross multiply
    6,428.40x = 8,876.70 × 4,074.72
  4. Step 4: Simplify right side
    6,428.40x = 36,170,067.02
  5. Step 5: Solve for x
    x = 36,170,067.02/6,428.40
  6. Step 6: Final answer
    x = 5,626.60

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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.