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Finding the Fourth Proportional to 6,428.88, 8,870.23 and 3,775.77

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Solution

The fourth proportional to 6,428.88, 8,870.23 and 3,775.77 is: 5,209.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,428.88 : 8,870.23 = 3,775.77 : x
  2. Step 2: Convert to fraction form
    6,428.88/8,870.23 = 3,775.77/x
  3. Step 3: Cross multiply
    6,428.88x = 8,870.23 × 3,775.77
  4. Step 4: Simplify right side
    6,428.88x = 33,491,948.33
  5. Step 5: Solve for x
    x = 33,491,948.33/6,428.88
  6. Step 6: Final answer
    x = 5,209.61

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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.